Which of the following statements best describes a certification authority?

A.
A certification authority is a technique to authenticate digital documents by using computer
cryptography.

B.
A certification authority is a type of encryption that uses a public key and a private key pair for
data encryption.

C.
A certification authority is an entity that issues digital certificates for use by other parties.

D.
A certification authority is a type of encryption that uses a single key to encrypt and decrypt
data.