Which service in a PKI will vouch for the identity of an individual or company?

A.
KDC

B.
CBC

C.
CA

D.
CR

Explanation:
A certificate authority provides public key certificates that an
individual or an organization presents in a transaction. The party receiving the
public key as a means of authentication or verification in a transaction can go back
to the CA and check the validity of the credentials provided by the individual or
organization. Thus, the CA vouches for the individual or organization.