History quiz

What best describes the result of letter above from Albert Einstein to Franklin D. Roosevelt as it relates World War 2?

Contributed to the development of the Manhattan Project and the creation of the atomic bomb

Albert Einstein's letter to President Roosevelt warned about the potential for Germany to develop an atomic bomb and urged the United States to initiate its own research program. This letter is widely regarded as a significant factor in the decision by the United States to embark on the Manhattan Project, the top-secret research and development effort that ultimately resulted in the creation of the atomic bomb during World War II.