(A) ** Manhattan Project
(B) Holocaust
(C) Kamikaze
(D) Double V Campaign
EXPLANATIONS BELOW
Concept note-1: -The Army component of the project was designated the Manhattan District as its first headquarters were in Manhattan; the placename gradually superseded the official codename, Development of Substitute Materials, for the entire project.
Concept note-2: -…was given the code name Project Y. One bomb, using plutonium, was successfully tested on July 16, 1945, at a site 193 km (120 miles) south of Albuquerque, New Mexico. …to by its code name Project Y.
Concept note-3: -Manhattan Project, U.S. government research project (1942–45) that produced the first atomic bombs.
Concept note-4: -The Manhattan Project produced two different types of atomic bombs, code-named Fat Man and Little Boy.