i think we don't have classic Catholic school (Christian school or what ever it would be called) so that is the reason they can pick.
I know that was a get one class less card. Friends friend picked religion (everyone was surprised as he was kinda a Bob Marley worshiper :D ) but then said he is an evangelist (a lot of Slovaks here are) and there was no sense for the school to do a class for 1 person :D
Clever kid. Sounds like he ended up getting what he wanted huh? I would've played the get one less class card too! No doubt about it.