A、  B、  C、  B疑问词开始的特殊疑问句，不能用Yes／No来回答，所以(C)项被排除。这道题询问放箱子的场所(Where)，(B)项的回答in the corner是具体的场所，因此是符合题意的。

Is it all right if I pay by credit card?
(A)Sure, I just had more printed.
(B)It’s down the hall to your left.
(C)Yes, we accept all major credit cards.

Where should I put these boxes?
(A)There should be three of them.
(B)You can set them in the corner.
(C)No, but I can put them in a bag for you.