A、Relatives. B、Neighbors. C、Roommates. B

W: Hi, I’d like to send this package by express mail to San Francisco and I would like to buy a sheet of stamps, please.
M: Here are your stamps, and just put the package on the scale.
Q: Where did the conversation take place?

M: I’ve just brought your ladder back. Thanks for lending it to me. Where shall I leave it?
W: Just lean it against the wall there. Use the ladder again any time.
Q: What’s the probable relationship between these two speakers?