I can't understand it, will you please _____ once more?

A．explain that word

B．repeat that word

C．explain us that word

D．explain that word for us

10086客服代表受理全网手机支付复杂业务（）等业务则由10086客服代表点击“转专席”按钮转接给手机支付二线客服受理。

A.咨询；

B.余额查询；

C.交易明细查询；

D.密码修改、投诉及建议；