As a Navy clinical psychologist assigned to a Marine operational unit , I was authorized to wear their uniform . The corporal rolled forward in his wheelchair and shook my hand firmly . " You have no idea how great it is to see that uniform , ma'am , " he said with a grin .
According to the above context, choose the best option to answer the following question.
Question: Why was the corporal seated ?
Options:
A. Because he could n't be bothered to get up .
B. Because he was in a position of authority .
C. Because he had gotten there a while ago .
D. Because he had lost the use of his legs .


D