Which of the following definitions best represents the meaning of the word invalided in this sentence from Ernest Hemingway's "In Another Country"?

The doctor told me that the major's wife, who was very young and whom he had not married until he was definitely invalided out of the war, had died of pneumonia.

A.
to be promoted with medals or honors
B.
to be tortured in prisoner of war camps
C.
to be discharged in disgrace for not reporting to duty
D.
to be removed from service due to injury or illness

Question

Which of the following definitions best represents the meaning of the word invalided in this sentence from Ernest Hemingway's "In Another Country"?

The doctor told me that the major's wife, who was very young and whom he had not married until he was definitely invalided out of the war, had died of pneumonia.

A. 
to be promoted with medals or honors
B. 
to be tortured in prisoner of war camps
C. 
to be discharged in disgrace for not reporting to duty
D. 
to be removed from service due to injury or illness

SmokeyBrown · Answer

Although it is no longer a common term, an "invalid" used to refer to a person who suffered from some disability.
Based on this background, I would guess that to be "invalided out of the war" would mean to be removed due to health condition, especially with the additional detail that the character "died of pneumonia".
I think one of the answer choices represents this interpretation, and that's the one I think you should go with. Can you identify the answer that matches the information given?