(A) ** work on the development of an atomic bomb
(B) increase economic production to meet wartime demands
(C) defend New York City against a nuclear attack
(D) recruit men for the military services
EXPLANATIONS BELOW
Concept note-1: -The Manhattan Project was the code name for the American-led effort to develop a functional atomic weapon during World War II.
Concept note-2: -The Manhattan Project began modestly in 1939, but grew to employ more than 130, 000 people and cost nearly US$2 billion (equivalent to about $24 billion in 2021).
Concept note-3: -Eight months after the United States entered World War II, the federal government launched the Manhattan Project, an all-out, but highly secret, effort to build an atomic bomb – and to build one before the Germans did.
Concept note-4: -Far away from public sight, the most consequential scientific innovation during World War II was the creation of the atomic bomb through the top-secret Manhattan Project.