J. robert oppenheimer for the manhattan project.
a.
identified scientists for los alamos
b.
identified sources of plutonium
c.
gave sketches of fat man components to the rosenberg’s
d.
signed the limited test ban treaty

J Robert Oppenheimer was a noted American scientist who would have his security clearances revoked during the 1950s for his opposition to America's nuclear weapons arsenal.

During the war, Oppenheimer was one of the leading figures in the Manhattan Project, directing the secret weapons lab.

While none of these answers is quite correct, A is the closest.

Oppenheimer developed into an extraordinary leader.

  A. Identified scientists for Los Alamos.

Explanation:

  He was the head of the Los Alamos laboratory during wartime and is credited for being the "father of the atomic bomb" with other people.

  Two months before the United States entered the world President Roosevelt approved a program to develop an atomic bomb. The chairman  Conant invited Oppenheimer to take over work on fast neutron calculations. He was given the title of "Coordinator of Rapid Rupture". As his first act, he hosts a summer school for bomb theory with some of his students and European physicists. Some of those were also credited with being "fathers of the atomic bomb".

  In June 1942 the US Army established the Manhattan Project and selected Oppenheimer as the head of the project´s secret weapons laboratory. He decided to place the lab in Los Alamos, a flat mesa near Santa Fe, New Mexico.

  I hope this answer helps you.

the answer is use of support