The Kinetics of a Reaction Are Observed to Be Third-Order

Multiple Choice

The kinetics of a reaction are observed to be third-order. The least likely mechanism

A) involves three molecules reacting together in a single step.
B) involves two molecules reacting in one step, and the third in a subsequent step.
C) involves a single intermediate.
D) involves more than one intermediate.
E) involves a fast step followed by a slow step.