Question

how was the united states policy of containment related to the marshall plan?
if the united states could contain the ussr and stop it from trading with other nations, the marshall plan would be successful.
by containing the economic growth of the ussr, the united states could use the marshall plan to stop the spread of capitalism.
the ussr could only be contained by military force, so the marshall plan built up the military of the united states.
the united states believed that the economic aid provided by the marshall plan would help contain the spread of communism.

Explanation:

The Marshall Plan was economic aid to Western - European countries post - WWII. The U.S. believed that by strengthening these economies, it could prevent the spread of communism, which was part of the containment policy.

Answer:

The United States believed that the economic aid provided by the Marshall Plan would help contain the spread of Communism.