To solve this question, the user needs to be familiar with common cybersecurity threats.
Now, let's go through each option and explain why it is right or wrong:
A. Repudiation: This option refers to an attacker's attempt to deny that they have performed an action. It does not involve impersonating another user or using a false identity to gain access to a system.
B. Eavesdropping: This option refers to an attacker's attempt to intercept and listen to communications between two parties. It does not involve using a false identity to gain access to a system.
C. Spoofing: This option is correct. Spoofing involves an attacker using a false identity to gain access to a system. This can be accomplished through a variety of means, such as email spoofing or IP address spoofing.
D. Hijacking: This option refers to an attacker's attempt to take control of a system or communication channel. It does not necessarily involve using a false identity, although it can be a means to that end.