The logs show that the user connected from Toronto (104.18.16.29) and Los Angeles (95.67.137.12) within minutes. The sudden location change is a typical trigger for geoblocking in a Next-Generation Firewall (NGFW), leading to the HR System being denied.
* A compromised account (B) would show failed login attempts or unusual activities, but all other access attempts were allowed.
* Business hours restriction (C) is unlikely since the user was granted access earlier.
* Approved subnet issues (D) would affect all applications, not just HR System access.