The Rate Law for the Reaction Between Chlorine and Nitric

The rate law for the reaction between chlorine and nitric oxide,
2NO(g) + Cl₂(g) → 2NOCl(g)
Is Rate = k[NO]²[Cl₂].Which of the following changes will not alter the initial rate of the reaction?

A) increasing the concentration of NOCl
B) decreasing the volume of the reaction system
C) running the reaction in a solvent rather than in the gas phase
D) increasing the volume of the reaction system
E) increasing the concentration of chlorine gas