What Inspired FDR to Set Up the Manhattan Project

What inspired FDR to set up the Manhattan Project?

A) Einstein warned him that the Germans were working on the same project.
B) He saw it as a way to get revenge on Japan for the bombing of Pearl Harbor.
C) He wanted to be able to provide clean,cheap energy.
D) He saw it as a way to scare Stalin after the war was over.
E) He wanted to use it against the Germans to end the war quickly.