What was the purpose of the Eisenhower Doctrine?

A. to justify secret operations to support American interests
B. to help Western allies regain control of the Suez Canal
C. to contain Soviet influence in the Middle East
D. to respond to communist threats with nuclear arms

C. to contain Soviet influence in the Middle East.

The Eisenhower Doctrine was a US foreign policy that aimed to counter the spread of Soviet influence in the Middle East by providing military and economic assistance to countries in the region that were threatened by communism. The doctrine was implemented in 1957 during the Cold War and was in response to the Suez Crisis, where Egypt nationalized the Suez Canal and threatened Western access to oil supplies.

The purpose of the Eisenhower Doctrine was C. to contain Soviet influence in the Middle East.

To get this answer, you can break down the options and analyze them one by one:

A. to justify secret operations to support American interests - This option is incorrect as the Eisenhower Doctrine was not focused on justifying secret operations but rather on the containment of Soviet influence in the Middle East.

B. to help Western allies regain control of the Suez Canal - This option is incorrect as the Eisenhower Doctrine was not specifically related to the Suez Canal, but rather focused on Middle Eastern countries in general.

C. to contain Soviet influence in the Middle East - This option is the correct answer. The Eisenhower Doctrine was implemented in 1957 to counter the spread of Soviet influence in the Middle East after the Suez Crisis. Under this doctrine, the United States pledged to provide military assistance to any Middle Eastern country threatened by communism.

D. to respond to communist threats with nuclear arms - This option is incorrect as the Eisenhower Doctrine primarily focused on providing military assistance to counter Soviet influence, rather than solely responding with nuclear arms.

Therefore, the correct answer is C. to contain Soviet influence in the Middle East.

The purpose of the Eisenhower Doctrine was to contain Soviet influence in the Middle East.