What does this event log indicate?

Sam, a security analyst with INFOSOL INC., while monitoring and analyzing IIS logs, detected an event matching regex /\w*((%27)|(’))((%6F)|o|(%4F))((%72)|r|(%52))/ix.

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

Answer: A

Explanation:

Reference: https://community.broadcom.com/symantecenterprise/communities/community-home/librarydocuments/viewdocument?DocumentKey=001f5e09-88b4-4a9a-b310-4c20578eecf9&CommunityKey=1ecf5f55-9545-44d6-b0f4-4e4a7f5f5e68&tab=librarydocuments