The correct answer is D) to be removed from service due to injury or illness.
The other options of the question were 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.
The definition that best represents the meaning of the word invalided in this sentence from Ernest Hemingway's "In Another Country" is "to be removed from service due to injury or illness."
When a soldier is invalided from the war it means that he was injured and has to be sent to the hospital for treatment. So he cannot participate in any war action at all. Ernest Hemingway's "In Another Country" is a short story written in 1927 as part of the collection called "A Man Without Women."