What Volume of Oxygen Gas Reacts with 5

What volume of oxygen gas reacts with 5.00 mL of methane,CH₄? (Assume temperature and pressure remain constant. )
__CH₄(g) + __O₂(g) __CO₂(g) + __H₂O(g)

A) 2.50 mL
B) 5.00 mL
C) 10.0 mL
D) 20.0 mL
E) none of the above