"The president must consider the possibility of developing the atomic bomb. I believe it will be done and I think we must do it before the Germans do." The answer is option C. Albert Einstein. Einstein wrote a letter to President F.D. Roosevelt telling him that there was work going on that turned uranium into a source of energy, and extremely powerful bombs could thus be created. Then he wrote that steps had to be taken to accelerate uranium research before Germany could build this new powerful bomb.