老师请问这个知识点在讲义哪里？

问题如下：

Even though risk managers cannot eliminate model risk, there are many ways managers can protect themselves against model risk. Which of the following statement about managing model risk is correct?

选项：

A.

Models should be test against known problems.

B.

It is not advisable to estimate model risk using simulations.

C.

Complex models are generally preferable to simple models.

D.

Small discrepancies in model outputs are always acceptable.

解释：

One way to protect against model risk is to test a model against known problems. It is always a good idea to check a model against simple problems to which one already knows the answer, and many problems can be distilled to simple special cases that have known answers. If the model fails to give the correct answer to a problem whose solution is already known, then this indicates that there is something wrong with it.