宴会是一种正式的，隆重的餐饮活动，宴会服务时应做到（）

A、服务操作时轻拿轻放

B、宾主致辞时保持安静

C、斟倒酒饮时从主人开始

D、宾主祝酒时，赶紧斟酒

What is the probable relationship between the two speakers
[A] Teacher and student. [B] Doctor and patient. [C] Husband and wife.