After the soviets broke the united states’ nuclear monopoly in august 1949, american officials studied various military counter-measures that could be taken to deal with the soviet threat. many of these recommendations - increased defense expenditures, a massive military buildup of conventional and nuclear weapons, etc. - were embodied in an important secret memorandum that was prepared for president truman; it was known as

The correct answer is National Security Council Paper (NSC-68).

Explanation:

National Security Council Paper (NSC-68) is a report written by the Department of State’s Policy Planning Staff (1950) passed to U.S. president Harry S. Truman (1884-1972).  Its authors concluded that by introducing more weapons -including nuclear weapons, to the Soviet arsenal, the Soviet threat would soon be greatly increased. They concluded that the best course of action was to respond with a major U.S. military and weapons build-up in kind.