The Reaction of Tert-Butyl Bromide, (CH₃)₃CBr, with Ethanol Affords

The reaction of tert-butyl bromide, (CH₃) ₃CBr, with ethanol affords the substitution product tert-butyl ethyl ether, (CH₃) ₃COCH₂CH₃, in acidic conditions.What would happen to the rate of the reaction if the concentration of ethanol was doubled?

A) The rate remains the same.
B) The rate decreases by a factor of 2.
C) The rate increases by a factor of 2.
D) The rate increases by a factor of 4.