Nitrogen Dioxide Undergoes Thermal Decomposition According to the Second-Order Reaction $\to$

Nitrogen dioxide undergoes thermal decomposition according to the second-order reaction 2 NO₂(g) $\to$ 2 NO(g) + O₂(g) .When 0.500 M NO₂ is allowed to react for 90.0 seconds,its concentration falls to 0.0196 M.What is the rate constant for the reaction?

A) 0.00534 M^-1s^-1
B) 0.589 M^-1s^-1
C) 0.545 M^-1s^-1
D) 0.0214 M^-1s^-1
E) 0.0231 M^-1s^-1