Speaker A: I have two tickets for the concert tonight. Would you like to come？ Speaker B:

Speaker A: I have two tickets for the concert tonight. Would you like to come？ Speaker B: ______

A．I"d love to, but I promised my mother I"d take my sister to a show.

B．Really？ When did you buy the tickets？

C．Why do you ask me to go with you？

D．I can"t because actually I"m not very keen on concerts.

请帮忙给出正确答案和分析，谢谢！