setting redundant components in subsystem to handle with the risks brought by the defaults of original components,what kind of risk response strategy is this？（）

A、risk avoidance

B、risk acceptance

C、risk mitigation

D、contingency plan

协助校长抓好德育工作，加强学生思想政治和品德教育的是（）

A.副校长

B.党支部书记

C.教导主任

D.总务主任