Why Was the Central Intelligence Agency Established

Why was the Central Intelligence Agency established?

A) To engage in peaceful negotiations with the Soviet Union and other Communist nations
B) To develop a computer network that would analyze the data collected by U.S.intelligence sources
C) To gather information relevant to the national defense and to perform any functions and duties related to intelligence affecting the national security
D) To oversee military outposts in strategic secret locations in Western and Eastern Europe and throughout the Middle East