Which of the following prompted the United States to develop the hydrogen bomb , a weapon nearly 1,000 times as powerful as the atomic bomb? Elimination Tool Select one answer A The occupation of Eastern Europe by the Soviet Union after World War II B The detonation of the atomic bomb by the Soviet Union in 1949 C The fall of China to communism in 1949 at the end of the Chinese Revolution D North Korea's invasion of South Korea in 1950