C₁₀H₈ + 12 O₂ --> 10 CO₂ + 4 H₂O. When 12 grams of O₂ reacts with 12 grams of C₁₀H₈, what is the limiting reactant?
a) O₂
b) C₁₀H₈
c) CO₂
d) H₂O