In western countries, when your friend offers (提供 )you something,  you can accept it directly(直接地), or refuse it politely.  Therefore, which situation fits the western custom?
A: Help yourself to some fish.
B:  No. I don 't like eating fish at all.
A: Here's a present for you.
B: I don't need it. You shouldn't spend so much money.
A: Would you like something to drink, beer or wine?
B: A glass of beer, please.
A.At a restaurant
B.At your birthday party
C. At a bar