Which of the Following Is the Rate Equation for the Following

Which of the following is the rate equation for the following reaction? CH₃CH₂CH₂CHBrCH₃ + NaN₃ $\rightarrow$ CH₃CH₂CH₂CHN₃CH₃ + NaBr

A) Rate = k[CH₃CH₂CH₂CHBrCH₃]
B) Rate = k[NaN₃]
C) Rate = k[CH₃CH₂CH₂CHBrCH₃] [NaBr]
D) Rate = k[CH₃CH₂CH₂CHBrCH₃] [NaN₃]
E) Rate = k[CH₃CH₂CH₂CHBrCH₃]² [NaN₃]