The manhattan project: a) was kept a secret from the entire executive branch except president roosevelt and vice president truman. b) enabled the development of an atomic weapon based on the theories of german scientists involving energy and matter. c) was operated jointly by the united states and great britain. d) produced an atomic bomb that was successfully tested before fdr’s death in 1945.

Enabled the development of an atomic weapon based on the the theories of German scientists involving energy and matter is the correct answer.

Explanation:

The project that was started to develop atomic weapons during the second world war in US is known as project Manhattan. The project began in 1939 with the support of president Franklin D. Roosevelt. The project was kept secret and not even the vice-president Truman was informed about it.  It was only after death of  FDR that Truman was informed and given reports about this project. The theories and formulas such as Einstein's mass energy equation was used in the construction of atomic bomb. The scientists working on Manhattan project successfully tested the atomic bomb on July 16, 1945. The first bomb was dropped over Hiroshima on August 6, 1945.

b. ensure mutual protection from communism.

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