What Is the Purpose of the Extended Nonowned Liability Coverage

What is the purpose of the extended nonowned liability coverage endorsement to the PAP?

A) to provide liability coverage for an insured's employer when an insured uses his or her auto for business purposes
B) to provide liability coverage for an insured who occasionally operates a nonowned auto
C) to provide liability coverage for anyone who loans a covered auto to another driver
D) to provide liability coverage for an insured who operates a nonowned auto on a regular basis