Q 047

If a level 6 Bard uses Words of Creation (doubles attack and damage bonus, though debatable) while strumming on a Masterwork Mandolin (+1 attack -1 damage) for IC, which should it be?

a) [+1 attack (base) +1 attack (mandolin)]*2 (WoC) = +4 attack
[+1 damage (base) -1 damage (mandolin)]*2(WoC) = +0 damage

b) +1 attack (base) *2 (WoC) +1 attack (mandolin) = +3 attack
+1 damage (base) *2 (WoC) -1 damage (mandolin) = +1 damage?

Essentially, I'm asking when you double.