B. <span>his acceptance of Buddhism </span>
The term The Greatest Generation was popularized by the title of a 1998 book by American journalist Tom Brokaw. ... Brokaw wrote that these men and women fought not for fame or recognition, but because it was the "right thing to do." This cohort is also referred to as the World War II generation.
The answer is D
Reason being that the sinking of ships by German U-boats, and a German attempt in the Zimmermann Note to get Mexico to declare war on the U.S. pushed the U.S. to getting involved.
This quote makes clear that there is a very clear hierarchy at the Executive Branch.
Only the truly hard decisions are left to the President. Most decisions in the Executive Branch are taken care of by people who are, as President Obama put it, "down the food chain".