—They are quiet, aren’t they?

—Yes. They are accustomed ________ at meals.

A．to talk

B．to not talk

C．to talking

D．to not talking

储户办理各种交易工具，包括存单、活期一本通存折、零存整取、存本取息、教育储蓄存折等的销户业务，或定期一本通存折中的所有款项全部支取后结清账户时，使用“销户”交易。( )