Which of the following is true of the 1961 invasion of Cuba at the Bay of Pigs?

A) The invasion was planned and executed by military experts in the Pentagon.
B) The invasion was based on the assumption that the Cuban people would rise up against Castro.
C) The invasion was elaborately planned and skillfully executed.
D) The invasion was launched only after several attempts by President Kennedy to negotiate with Castro had ended in failure.

The invasion was based on the assumption that the Cuban people would rise up against Castro, but this assumption was proven false and resulted in a disastrous defeat for the invading forces. The invasion plan was developed by the CIA with support from the Eisenhower administration, and President Kennedy inherited the plan when he took office. Kennedy scaled back the invasion plan and refused to provide air support, which further contributed to the failure of the mission.