The Hydrolysis of Tert-Butyl Chloride Proceeds More Rapidly in a Solvent

Multiple Choice

The hydrolysis of tert-butyl chloride proceeds more rapidly in a solvent mixture which is 70% water/30% acetone than in one which is 30% water/70% acetone.Why?

A) The transition state in the carbocation formation step is better stabilized in the more polar solvent mixture.
B) The reaction proceeds by an S_N2 mechanism wherein the rate is increased by increasing the concentration of the nucleophile water.
C) The reaction proceeds by an S_N1 mechanism wherein the rate is increased by increasing the concentration of the nucleophile water.
D) The solvent which contains a greater percentage of water is less polar,and this destabilizes the tert-butyl chloride.
E) none of the above