When using Kerberos, what is the purpose of a ticket?

a.
It is the event that is generated when auditing a resource and unauthorized access is attempted.

b.
It is the name for a Kerberos client or user.

c.
It is a temporary set of credentials that a client uses to prove to other servers that its identity has been validated.

d.
It is a key used by the client to gain access to services that are protected by the key on the network.