呼叫服务员在进行电话服务时，应认真清楚的记录，并运用“5W1H”技巧，所谓“5W1H” 是指：()和 How。

A.When, Who, Which, What, Why

B.Which, Who, Where, What, Why

C.When, Who, Where, What, Which

D.When, Who, Where, What, Why