The Decomposition of Hydrogen Peroxide in Solution Was Studied in the Laboratory

The decomposition of hydrogen peroxide in solution was studied in the laboratory, and the following mechanism was proposed based on the experimental data. Which one of the following statements is false?

A) The reaction is first order with respect to H₂O₂.
B) The reaction is first order with respect to I^-.
C) I^- is a catalyst.
D) IO^- is an intermediate.
E) The reaction is first order with respect to IO^-.