Which of the following is true regarding Einstein's attempt to influence the use of his discovery of the energy equation?

A) He recommended to President Roosevelt that nuclear fission be used to develop
weapons to defend against enemies.

B) He recommended to President Roosevelt that nuclear fission should not be used to
develop weapons.

C) He supported the use of radioactive elements for medical purposes such as the X-
ray.

D) He thought his energy equation should remain top secret and no further research
pursued.