A "Coordination of Benefits" Provision in a Health Insurance Policy

A "coordination of benefits" provision in a health insurance policy may possibly provide which of the following benefits?

A) Allows the policy holder to be double-covered for the same loss.
B) Provides broader coverage than a policy without such provision.
C) Often results in lower-cost insurance premiums.
D) Drops pre-existing conditions clauses from a policy.
E) All of the above