The Rate Constant for a Second-Order Reaction Is 0

The rate constant for a second-order reaction is 0.13 M^-1s^-1. If the initial concentration of reactant is 0.26 mol/L, it takes __________ s for the concentration to decrease to 0.11 mol/L.

A) 0.017
B) 0.68
C) 9.1
D) 40.
E) 5.2