1. Even after Stalin's death in 1953, the Soviet Union made it clear that it would not <span>allow Eastern European satellites to become independent of control. The correct option is the fourth option.
2. </span>In response to Nagy's declaration of Hungarian independence, Khrushchev reacted by attacking Budapest. <span>The correct option is the first option.
3. </span><span>After World War II, Stalin focused the economic recovery in the Soviet Union on heavy industry. The correct option is the first option.</span>
John Wallis was an English clergyman and mathematician who is given partial credit for the development of infinitesimal calculus. Between 1643 and 1689 he served as chief cryptographer for Parliament and, later, the royal court. He is credited with introducing the symbol ∞ to represent the concept of infinity.