专用记账凭证按其所反映的经济业务是否与现金和银行存款有关，通常可分为( )。

A．收款凭证

B．付款凭证

C．转账凭证

D．结算凭证

Speaker A: Thank you for everything you’ve done for me during my stay here.
Speaker B: ().

A. Oh, this is what I should do.

B. You are welcome.

C. Don’t say that. Actually I have done little for you.

D. I’m sorry for not having looked after you well.