A CRL is comprised of.

A.
Malicious IP addresses.

B.
Trusted CA’s.

C.
Untrusted private keys.

D.
Public keys.

Explanation:
A certificate revocation list (CRL) is created and distributed to all CAs to revoke a certificate or key.
By checking the CRL you can check if a particular certificate has been revoked.
The certificates for which a CRL should be maintained are often X.509/public key certificates, as this format is
commonly used by PKI schemes.