what is the benefit of configuring loss priority?

When using class of service (CoS), what is the benefit of configuring loss priority?

A.
It can be used by other CoS components to drop certain traffic on ingress.

B.
It can be used to define bandwidth allocation for certain traffic on egress.

C.
It can be used to assign new CoS values to certain traffic on ingress.

D.
It can be used by other CoS components to drop certain traffic on egress.

Explanation: