A、He can’t remember people by sight. B、He can’t remember people by name. C、He has a terrible memory for football. D、He has a har

W: Why is there a big sign on the back of your door that says "keys"?
M: It’s to remind me to take my keys when I go out because I’m always locking myself out by accident! It doesn’t help though. Now I just forget to read the sign.
Q: Why is there a sign on the back of the door?

W: Oh look! There’s the guy we saw last week, playing football in the park! He looked great in his kit, remember?
M: I don’t remember him. I’ve got a terrible memory for faces. I even have a hard time recognizing people I’ve been introduced to.
Q: What is the man’s problem?