A: He's waiting for you to pronounce them man and wife.
You should probably say something.
They've been standing there a while.
They're not going to magically disappear if you ignore them.
Staying still won't help. These are human beings, not T-Rexes.
This is why I don't like you taking mushrooms before work.
It's one thing before a mass, when no one's really paying attention, but people care about weddings.