have the trigger check to see if the bool for that object is "true" and unlock it if so-
If that's the second choice, wouldn't I need to set up some system to have all three triggers be identified by the locked door? Like what you mentioned that would mean you'd have to set up the trigger with a standard checking system that would include Get FSM Bool, Bool Test, Set Bool Value, etc, right?
What would be the other methods? Because I'm curious about what alternatives I have for this type of puzzle.