For the overall reaction 2A + B → C, which of the following mechanisms yields the correct overall chemical equation and is consistent with the rate equation below? Rate = k[A]²[B]?
1) Mechanism 1: A + B → C
2) Mechanism 2: 2A + B → C
3) Mechanism 3: A + 2B → C
4) Mechanism 4: A + B → 2C