What Is the Coefficient of O₂ When the Following Equation $\rarr$

Multiple Choice

What is the coefficient of O₂ when the following equation is properly balanced with the smallest set of whole numbers?
___ CH₃OH + ___ O₂ $\rarr$ ___ CO₂ + ___ H₂O

A) 1
B) 2
C) 3
D) 7
E) none of these