Which among the following is the best example of the hacking concept called "clearing tracks"?

Creating a backdoor is the 'maintaining access' phase of hacking, which ensures persistent re-entry, not the removal of evidence.

Injecting a rootkit is a technique associated with privilege escalation and maintaining stealthy persistence, not specifically with erasing forensic evidence.

Gaining access through an exploitable vulnerability represents the 'gaining access' or exploitation phase, which precedes clearing tracks.

Corrupting or deleting event logs is a textbook example of clearing tracks because event logs are the primary forensic artifact used to detect and reconstruct an intrusion. By corrupting logs on all machines, the attacker eliminates timestamped records of their actions, making detection and incident response significantly harder. This maps directly to the 'Indicator Removal' technique in the post-exploitation phase of the hacking lifecycle.