Question

the american expeditionary forces were led by..

ain c york
teddy roosevelt
john j pershing
dough boys

Explanation:

The American Expeditionary Forces during World War I were led by John J. Pershing. He was a prominent military leader who commanded U.S. forces in Europe during the war. Alvin C. York was a decorated soldier, Teddy Roosevelt was a former president and not the leader of the AEF, and "Dough - Boys" was a term for American soldiers, not a leader.

Answer:

C. John J. Pershing