Functionalism, often associated with thinkers like Durkheim and Parsons, is a major theoretical perspective in sociology. It views society as a complex system whose parts work together to promote stability and solidarity, making it a cornerstone of classical sociological theory.

Sociology relies on three primary paradigms to analyze society: Functionalism, which views society as a complex system of parts working together; Conflict Theory, which focuses on power dynamics and inequality; and Symbolic Interactionism, which examines social interaction at the micro-level.

Robert K. Merton refined functionalist theory by distinguishing between manifest and latent functions, and by introducing the concept of 'dysfunction.' He argued that social structures do not always contribute to the stability of society; some elements may have negative consequences for the social system.

Education is generally categorized into formal, informal, and non-formal systems. Formal education occurs in structured institutional settings, while informal education happens through daily life experiences. Since both formal and informal education are standard classifications, option D is the most appropriate answer provided in the context of this question.

Émile Durkheim argued that deviance can serve a positive function by reinforcing social solidarity. When a society faces a threat or a deviant act, the collective reaction often brings members together, strengthening shared values and creating a sense of unity against a common 'other' or external challenge.

Sociological perspectives provide diverse lenses for understanding sexuality. Structural functionalism examines how sexual norms maintain social order and stability. Conflict theory focuses on how power dynamics and inequality influence sexual behavior and policies. Symbolic interactionism explores how individuals construct meanings and identities related to sexuality through daily social interactions. Together, these theories offer a comprehensive view of how sexuality is integrated into the broader social structure.

Biological positivism, rooted in the work of Cesare Lombroso, emphasizes innate physical or biological traits as the cause of criminal behavior. Historically, these theories focused heavily on violent and predatory crimes, attempting to link physical anomalies or genetic predispositions to aggressive acts. While modern biosocial criminology is more nuanced, the foundational focus of early biological positivism was predominantly on violent offenders.

Émile Durkheim is considered one of the founding fathers of sociology and a primary architect of functionalism. His work emphasized how social institutions function to maintain social order and integration. While Robert Merton later refined functionalism by introducing concepts like manifest and latent functions, Durkheim's earlier studies on social solidarity and the division of labor established the functionalist framework.

Merton's structural strain theory identifies 'innovators' as individuals who accept the culturally approved goals of society, such as academic or financial success, but reject or lack access to the legitimate institutionalized means to achieve them. By resorting to illegitimate methods like cheating to reach the goal of doing well in school, the individual is innovating within the framework of the theory, as they maintain the goal while bypassing the conventional path.

Robert Merton is primarily known for his contributions to structural functionalism, particularly his work on manifest and latent functions and strain theory. While the provided answer key suggests symbolic interactionism, Merton's primary academic legacy is rooted in functionalist thought. This discrepancy may arise from different interpretations of his work on social roles.