单项选择题

W: Tom.do you want to go shopping with me this morning
M: Sure,but I can’t leave right now.I’ve lost my room key and I have to want for the security guard to let me back into my room.
Q: What is Tom’s problem()



A. He won’t go shopping without a guard.
B. He left his room key in a shop.
C. He can’t get into the guard room.
D. He couldn’t find his room key.