Consider the following reaction:
CH₄ (g) +4Cl₂(g) → CCl₄(g) + 4HCl(g)

What mass of CCl₄ is formed by the reaction of 2.00 g of methane with an excess of chlorine?
a. 4.80 g
b. 0.210 g
c. 308 g
d. 19.2 g?