Answer:
B. giving aid to keep a country independent.
Step-by-step explanation:
This is the best description of the policy of containment. This was a policy that was adopted by the United States in order to stop the spread of communism. The United States worked with its allies in order to try to stop and dismantle communism after World War II.
This included both the Marshall Plan and the Truman Doctrine. The Marshall Plan consisted of giving foreign aid to Western Europe in order to help with its economic recovery. The Truman Doctrine consisted on providing financial aid to nations threatened by communism, such as Greece and Turkey.