The Reaction of (CH₃)₃CBr with Hydroxide Ion Proceeds with the Formation

The reaction of (CH₃) ₃CBr with hydroxide ion proceeds with the formation of (CH₃) ₃COH.(CH₃) ₃CBr (aq) + OH^- (aq) → (CH₃) ₃COH (aq) + Br^- (aq)
The following data were obtained at 55°C.
What will the initial rate (in mol/L • s) be in Experiment 4?

A) 18 × 10^-3
B) 6.0 × 10^-3
C) 9.0 × 10^-3
D) 3.0 × 10^-3
E) none of these