Methane Can Be Reacted with Steam to Produce Carbon Dioxide

Methane can be reacted with steam to produce carbon dioxide and hydrogen gas in a two step reaction. The resulting overall reaction can be written
CH₄(g) + 2 H₂O(g) → CO₂(g) + 4 H₂(g)
How many grams of hydrogen can be produced from each gram of methane?

A) 1.006
B) 0.503
C) 0.377
D) 0.251
E) 4.000