Pls help multiple choice!!!

For the reaction
C₂H₂(g) +30₂(g) → 2CO₂(g) + 2H₂O(g)
if 4.4 mol of CO₂ are produced, how many moles of O₂ were reacted?

-5.5 mol
-6.6 mol
-2.9 mol
-11.0 mol
-none of these​