Which of the following BEST describes the process of key escrow?

A.
Maintains a copy of a user’s public key for the sole purpose of recovering messages if it is lost

B.
Maintains a secured copy of a user’s private key to recover the certificate revocation list

C.
Maintains a secured copy of a user’s private key for the sole purpose of recovering the key if it is lost

D.
Maintains a secured copy of a user’s public key in order to improve network performance