The Following Reaction Illustrates the Reaction of Methanol with Oxygen

The following reaction illustrates the reaction of methanol with oxygen to form carbon dioxide and water: ​
2CH₃OH( l ) + 3O₂( g ) → 2CO₂( g ) + 4H₂O( l ) .
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How many moles of water are produced in a reaction of 15 moles of methanol with 30 moles of oxygen?

A) 20 moles
B) 30 moles
C) 40 moles
D) 50 moles