The Following Mechanism Has Been Suggested for the Decomposition of Ozone

Multiple Choice

The following mechanism has been suggested for the decomposition of ozone, O₃.O₃(g) O₂(g) + O(g) (fast equilibrium)
O(g) + O₃(g) $\rarr$ 2 O₂(g) (slow)
Consider the following statements in light of this mechanism:
I. The rate law is second order in O_3.
II. The rate does not depend on the concentration of O_2.
III. The reaction slows with increased O₂ concentration.
IV. The rate law is second order.
V. Substances reacting with O atoms will speed up the reaction.Which of the above statements are true?

A) II and V
B) II only
C) I and IV
D) I and III
E) II, IV and V