What was the project that developed the first atomic bomb during World War II?

• A. Trinity Test
• B. Manhattan Project
• C. Apollo Program
• D. Project Mercury

Answer: (B)

Developing the first atomic bomb required a massive, multi-site effort that brought together scientists, engineers, and military leadership under government direction. This U.S. government program coordinated research across laboratories and universities, built the necessary facilities to produce fissile material, and designed and assembled actual weapons. It operated at key sites like Los Alamos, Oak Ridge, and Hanford, with leaders such as Leslie Groves and J. Robert Oppenheimer guiding the work. The project produced two weapon designs, and it culminated in a test—the Trinity Test in New Mexico—to prove the device could work. The other options refer to space programs or to the test itself, not to the development effort as a whole.