Which term refers to the secret WWII project that developed the atomic bomb?

• A. Manhattan Project
• B. Manifest Destiny
• C. Marshall Plan
• D. Militarism

Answer: (A)

This item tests knowing the name of the WWII program that built the atomic bomb. The term Manhattan Project refers to the top-secret U.S.-led research and development effort during World War II, carried out with help from the United Kingdom and Canada, to design, test, and assemble nuclear weapons. It unified scientists, engineers, and military resources, with famous sites at Los Alamos, Oak Ridge, and Hanford, ultimately delivering the first atomic bombs.

The other terms describe different things: Manifest Destiny is the 19th‑century belief in U.S. westward expansion; the Marshall Plan was the postwar European recovery program; militarism is an approach or ideology about prioritizing military power. None of these denote the secret wartime project to develop atomic bombs, so the Manhattan Project is the correct term.