The correct answer is "D".
Pan-Africanism is a global movement which aims to encourage the strengthening of bonds of solidarity between all people of African Descent. This movement was established in 1963 into an organization called the Organization of African Unity.
This movement was of high importance during the revolutionary currents that were occurring in Africa during the half of the 20th century, as its efforts, which came from numerous groups from different parts of the world represented a strong ideological force that ended up being greatly influential for African Countries to achieve their independence.