The correct answer is C) for Cuban exiles to overthrow Castro.
The purpose of the Bay of Pigs invasion was for Cuban exiles to overthrow Castro.
After Communist leader Fidel Castro had overthrown Fulgencio Batista as the President of the Island of Cuba, the White House supported an invasion to defeat Castro's troops and reinstall a democratic capitalist form of government. The operation started on April 17, 1961, and was led by Cuban exiles with the support of US troops. However, it failed right away. The Soldiers of Castro defeated the invaders and in just one day the operation had ended.