Context: 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 .
Question: Why did the corporal grin ?
Option 0: He thought a woman in uniform was funny .
Option 1: He appreciated seeing the familiar uniform again .
Option 2: None of the above choices .
Option 3: He and the woman shared a joke .
Answer: 1