What was the Manhattan Project?

• A. A project to map the human genome.
• B. The code-name for the U.S. program that developed the first nuclear weapons during World War II.
• C. A project to build the interstate highway system.
• D. A program to colonize the Moon.

Answer: (B)

The question tests knowing what the Manhattan Project was: a top-secret U.S. program during World War II created to develop the first nuclear weapons. It brought together scientists and engineers from the United States, Britain, and Canada under military direction, running from the early 1940s to 1945. Key sites included Oak Ridge for uranium enrichment, Hanford for plutonium production, and Los Alamos for weapon design, with J. Robert Oppenheimer leading the scientific work and General Leslie Groves overseeing operations. The result was the first atomic bombs, which helped end the war and marked the beginning of the nuclear age. The other options don’t fit because they refer to events or projects in entirely different domains and eras: genome mapping is modern biology, the interstate highway system is a mid-20th-century infrastructure project, and colonizing the Moon belongs to the space programs of the 1960s and beyond.