When the Following Equations Are Balanced Using the Smallest Possible $\rightarrow$

When the following equations are balanced using the smallest possible integers, what is the number in front of the underlined substance in each case?
-CH₃OH(l) + O₂(g) $\rightarrow$ CO₂(g) + H₂O(g)

A) 1
B) 2
C) 4
D) 6
E) 12