Many Scientists Who Helped Develop the Atomic Bomb for the United

Many scientists who helped develop the atomic bomb for the United States:

A) were hired by the joint authority of the United States, England, and the Soviet Union.
B) made it known that they felt the project should not be kept secret.
C) insisted that no one but them be given access to the research building.
D) had escaped from Fascist and Nazi aggression in Europe.