A Certain Reaction A $\rarr$ Products Is Second Order with Respect to A

Multiple Choice

A certain reaction A $\rarr$ products is second order with respect to A.If it takes 45 min to reduce the concentration of A from 0.350 M to 0.125 M, what is the rate constant for this reaction?

A) 3.8 x 10^-4 M^-1min^-1
B) 1.9 x 10^-3 M^-1min^-1
C) 5.0 x 10^-3 M^-1min^-1
D) 2.3 x 10^-2 M^-1min^-1
E) 1.1 x 10^-1 M^-1min^-1