The Data Below Were Determined for the Reaction Shown Below $\rarr$

The data below were determined for the reaction shown below.
S₂O₈^2- + 3I ^- (aq) $\rarr$ 0 2SO₄^2- + I₃^-


The rate law for this reaction must be:

A) rate = k[S₂O₈^2- ][I ^-]³
B) rate = k[S₂O₈^2-]
C) rate = k[S₂O₈^2-]²[I ^-]²
D) rate = k[I ^-]
E) rate = k[S₂O₈^2-][I ^-]