Determine the rate of a reaction that follows the rate law: rate = k[A]m[B]n, where:
k=1.5
[A]=1M
[B]=3m
m=2
n=1

A. 4.5 (mol/L)/s
B. 1.5 (mol/L)/s
C. 13.5 (mol/L)/s
D. 9.0 (mol/L)/s