Two Rights and a Wrong, select the wrong answer and explain.
A. The hierarchical trust model assigns a single hierarchy with one master CA called the root.
B. An OID, which names an object or entity, corresponds to a node in a hierarchy tree structure. OIDs can name every object type in an X.509 certificate.
C. When a digital certificate is revoked, the user must update internal records and any CRL with the required certificate information and timestamp.