What reason can you infer for jarrell's ball turret gunner entering the armed forces?

A. Without much thought

B. Because he felt a patriotic duty

C. Only because he was drafted

D. After careful decision

"The Death of the Ball Turret Gunner" is written by Randall Jarrell. I can conclude that the reason of entry to the armed forces for Jarrell's ball turret gunner is because he felt a patriotic duty. This five-line poem was the most anthologized poem of Jarrell.