Yes because Committees help to organize the most important work of congress, they have the job of considering, shaping, and passing laws to govern the nation.
The correct answer is A. The Yalta Conference established that Germany and Berlin would both be split into four occupied zones. The Conference also established that Free Elections were to occur in Eastern Europe. The Yalta Conference had nothing to do about Cuba, much less the illegal establishment of communism in it since the United States considered it a commonwealth at the time.
The correct answer is a Superpower.
The only two countries that left World War II with any real strength were the United States and the Soviet Union.
This set the stage for a 45-year "Cold War" wherein the two countries built up their nuclear arsenals and fought in proxy wars to determine who would be the sole superpower.
The United States won and the Soviet Union collapsed.