Why Bob is able to access Mafiawars from the internal network?

Mafiawars is a game that can be accessed from the Facebook Website. Although the firewall administrator
has set up a rule to block Facebook games, Bob is able to access Mafiawars from the internal network.
Why?

A.
The URL is facebook.mafiawars.com and can still be accessed.

B.
There is a less restrictive rule on top of the other rule.

C.
The administrator should block the Games category anyway.

D.
The URL was not configured as a RegEx (regular expression).