In 2011, the global population was approximately 7 billion people. Given the Earth's total land area of about 148.9 million square kilometers, the average population density was roughly 45 to 47 persons per square kilometer. This figure provides a general measure of how human population is distributed across the habitable land surface of the planet.

The United Nations officially designated October 31, 2011, as the symbolic date when the world population reached the 7 billion milestone. This estimation was based on demographic trends and census data from various countries. The event highlighted the rapid growth of the global population and the associated challenges regarding resources, sustainability, and urban development in the 21st century.

South Sudan officially became an independent sovereign state on July 9, 2011. This followed a successful independence referendum held in January 2011, where the vast majority of the population voted to secede from the Republic of the Sudan. The independence marked the end of a long-standing civil conflict and established the nation as the newest member of the international community at that time.

Muammar Gaddafi, who ruled Libya for over four decades, was captured and killed in his hometown of Sirte on October 20, 2011. This event marked a significant turning point in the Libyan Civil War and the eventual collapse of his regime following the Arab Spring uprisings that began earlier that year.

In February 2011, the Arab League took the significant diplomatic step of suspending Libya's membership. This action was a direct response to the Muammar Gaddafi regime's violent crackdown on protesters and the use of military force against civilians during the early stages of the Libyan Civil War, which eventually led to international intervention.

On May 7, 2023, the Arab League officially voted to reinstate Syria's membership. Syria had been suspended from the organization in 2011 due to the government's violent crackdown on protests during the early stages of the Syrian Civil War. This decision marked a significant shift in regional diplomacy and the normalization of relations between Syria and other Arab states.

The 2011 G-20 summit, which was the sixth meeting of the heads of government of the G20 major economies, took place in Cannes, France, on November 3–4, 2011. The summit focused on global economic stability and the European sovereign debt crisis.

Hosni Mubarak assumed the presidency of Egypt on October 14, 1981, following the assassination of his predecessor, Anwar Sadat. He remained in power for nearly 30 years until he was forced to resign on February 11, 2011, during the widespread protests known as the Egyptian Revolution.

Historically, Sudan was the largest country in Africa before the independence of South Sudan in 2011. While Algeria is currently the largest country on the continent by land area, within the context of the provided options, Sudan remains the largest among the choices listed.

In a speech delivered at West Point in December 2009, President Barack Obama announced a surge of troops to Afghanistan while simultaneously setting a timeline for the beginning of the withdrawal process. The administration specified that the transition and withdrawal of U.S. forces would begin in July 2011.