Ethanol,C₂H5OH,is Made from Fermenting Grain and Is Blended with Gasoline

Ethanol,C₂H5OH,is made from fermenting grain and is blended with gasoline to make "gasohol." If the combustion of ethanol produces carbon dioxide and water,what is the coefficient of oxygen in the balanced equation? __C₂H5OH(g) + __O₂(g) __CO₂(g) + __H₂O(g)

A) 1
B) 2
C) 3
D) 6
E) none of the above