$49.$ Richard Risk is setting up a system to manage the certificates of insurance his company receives from its subcontractors. What are the key steps Richard$$s certificate management system should include?

$($Search Chapter $8)$

a$.$ Obtain the certificate, put it in a file with other certificates, and purge the file periodically.

b$.$ Obtain the certificate, attach it to the contract, and file it for future reference.

c$.$ Obtain the certificate, review and verify compliance with requirements, monitor ongoing compliance, and maintain a semipermanent record of the certificate.

d$.$ Obtain the certificate, verify that it is signed by an authorized representative of the insurer, and file it in a convenient location.