为什么不是LDQ

问题如下：

Which test is described as stricter in evaluating VaR models, resulting in 19 firms' models failing it?

选项：

A.

Unconditional coverage test.

B.

Conditional coverage test.

C.

VaR quantile regression test.

D.

Logistic dynamic quantile test.

解释：

The VaR quantile regression test is stricter, and 19 firms' models failed it.