Which of the Following Statements Is Incorrect

Which of the following statements is incorrect?

A) The slow step in a mechanism generally involves a three-body collision.
B) After the addition of a catalyst,the collision rate between molecules is still the same.
C) Most collisions between reactant molecules do not lead to a product.
D) Chemical reactions involve collisions between the participating molecules.
E) A three-body collision is less likely than a two-body collision.