The correct answer is letter choice D) The United States believed that the economic aid provided by the Marshall Plan would help contain the spread of Communism.
The Marshall Plan was a law passed after World War II. This plan was introduced by Secretary of State George C. Marshall. This plan was focused around giving money to countries that suffered severe damage during World War II. The goal of providing this money was to help America make allies and to help each country rebuild their infrastructure. This aid to countries like Great Britain and France would help them recover from World War II and would allow them to keep in place their capitalist type system. This means that communism would not spread, achieving America's goal of containment.
A single-interest group is a group that is trying to push forward legislation and momentum around, well, a single-issue.
This might mean gun-control or reproductive rights.
They might have candidates in one party that they prefer but they are broadly trying to convince ALL candidates to believe what they believe.
So, B is the correct answer.
Westerlies blow west to east picking up warmth from this current and carry it to Europe. There aren't any (large) mountain ranges that can block the winds so they are felt far inland. They carry moisture giving their region rainfall.
