A User Received a Call from a Bank to Confirm

Multiple Choice

A user received a call from a bank to confirm a wire transfer; however, the user created no such request. While troubleshooting, a technician discovers there are rules on the user's account that are forwarding the emails to an external email address and deleting the emails from the bank. This is an example of:

A) spam email.
B) invalid certificates.
C) hijacked email.
D) browser pop-ups.