Final answer:
Captain Alfred A. Geiger was the first Marine to earn his wings, becoming Naval Aviator #49 in 1917, marking an important moment in U.S. Marine Corps aviation history. The correct answer is A.
Step-by-step explanation:
The student is asking about a historical figure related to the U.S. Marine Corps aviation history. The correct answer is A. first. Captain Alfred A. Geiger became the first Marine to earn his wings when he was designated Naval Aviator #49 in 1917. This was a significant milestone in Marine Corps aviation, which has since played an instrumental role in U.S. military operations.