Frank Filler buys an OCP policy for Oscar Owner as required in a construction contract. To avoid the OCP insurer$$s attempt to recover from Frank amounts paid under the policy due to his negligence, Frank should insist that the policy include

$($Search Chapter $7)$

a$.$ a general supervision endorsement.

b$.$ a waiver of subrogation endorsement.

c$.$ a limitation of liability endorsement.

d$.$ a strict liability endorsement.