英语短对话理解

英语短对话理解
A:I forgot to tell you that Fred called last night to borrow your sleeping bag.
　　B:Oh,I saw him at the gym this morning and he didn't say anything.So he must've asked somebody else.
　　What does the man imply?
A.someone else told him Fred had called B.the man looked for Fred at the gym
C.it was not really Fred who called D.Fred probably borrowed someone else's sleeping bag.