What did Herbert Hoover’s wartime service have in common with that of George Creel?

A.
Both received commissions as officers in France.

B.
Both were longtime friends of Woodrow Wilson.

C.
Both had originally favored Germany in the war.

D.
Both stressed voluntarism and rejected coercion.

D. Both Herbert Hoover and George Creel stressed voluntarism and rejected coercion during their wartime service. Hoover was appointed as the head of the U.S. Food Administration during World War I, where he encouraged Americans to conserve food voluntarily to support the war effort. Creel was appointed as the head of the Committee on Public Information, where he encouraged Americans to support the war effort through voluntary propaganda efforts.