《西游记》中唐僧师徒四人西天取经，经过跋山涉水，九九八十一难后修得正果，他被加封。沙僧和孙悟空分别被封为（）和斗战胜佛

Which of the following institutional investors is most likely to have the lowest risk tolerance（）

A. Banks.

B. Endowments.

C. Defined benefit pension plan.