What must be done to permit access in a timely manner?

A network administrator notices that after a company-wide shut down, many users cannot connect their laptops to the corporate SSID .

What must be done to permit access in a timely manner?
A . Authenticate the user’s system to the secondary Cisco ISE node and move this user to the primary with the renewed certificate.
B . Connect this system as a guest user and then redirect the web auth protocol to log in to the network.
C . Add a certificate issue from the CA server, revoke the expired certificate, and add the new certificate in system.
D . Allow authentication for expired certificates within the EAP-TLS section under the allowed protocols.

Answer: A