Her parents had had a very anxious moment but everything _____ to be fine in the end.

A．turned up

B．carried out

C．turned out

D．carried away

投诉处理的基本要求包括：建立投诉处理机制、（）、明确投诉处理时限、跟进投诉处理结果。

A.认定投诉责任人

B.设置投诉处理机构

C.畅通投诉处理渠道

D.梳理投诉办理流程