Demon Bear Gear

I have seen people asking about this gear, and how to activate the effects, so I wanted to ask you @Jythri @gRANT @JoeKGBX how its Demon Bear effect Procs? Specifically does it:
A) Require you to activate another peice of the set yourself, for a 2 legendary set of Gear?
B) Require you to have a Demon Bear only gear set to activate all of them?(Unlikely)

C) Require all peices active across your team? Because do to the solo-que and the recent changes to stop large groups stomping, this seems weird. Due to lack of communication, it is unlikly you will have a team with the entire set, so it feels wierd.

Thanks for the response, and once answered, can this topic be closed?

These are my questions as well