What does this event log indicate?

John, a SOC analyst, while monitoring and analyzing Apache web server logs, identified an event log matching Regex /(.|(%|%25)2E)(.|(%|%25)2E)(/|(%|%25)2F|\|(%|%25)5C)/i.

What does this event log indicate?
A . XSS Attack
B . SQL injection Attack
C . Directory Traversal Attack
D . Parameter Tampering Attack

Answer: C