Final answer:
The scenario given is an example of a hijacked email, where unauthorized rules in an email account forward sensitive information and delete evidence of the communication.
Therefore, the correct answer is: option C). hijacked email.
Step-by-step explanation:
Email hijacking is another form of man-in-the-middle attack, in which the hacker compromises and gain access to a target's email account. The attacker then silently monitors the communications between the client and the provider and uses the information for malicious purposes.
This can lead to serious security issues, such as financial fraud or identity theft. It's important to regularly check email settings and account activities for any unexpected rules or behaviors and to use strong passwords and two-factor authentication to help prevent unauthorized access to accounts.
In this case, when an unauthorized party creates rules in a user's email account that forward sensitive information to an external email address and then delete evidence of the communication, it is a clear case of email hijacking.