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

Nitrogen dioxide undergoes thermal decomposition according to the second-order reaction 2 NO₂ (g) $\rightarrow$ 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