When making damage rolls for adversaries, do I add anything to the listed DM in the melee line?

An example: A manwolf's melee is listed as:

Melee: Claw or Bite 7d (+6 damage)

So when I roll damage, do I...
a) roll 6d
b) roll 13d (7d+6 DM)
c) roll 10d (Manwolf's Hell's Favor score of 4 +6 DM)
d) something else entirely

All this time, I've been assuming it's C, or possibly A. Got a game tonight and expecting LOTS of combat (it's been building up to this point), so want to make sure I have it right.

Thanks!
Tom

It works like PC damage. Successes over required +6d

Clint,

That makes sense. Thanks for the quick answer!

Tom