How successful was the policy of Containment in China?

Very successful sense South Korea did not become communist or it did not spread there.

Explanation:

In both Asia and Europe, containment measures have reflected a perceived need for complementary interaction between military policies and aid programs in order to prevent aggression by Communist powers and to foster the internal stability of nations in the area.

answer; i believe its a

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.