Urease Is an Enzyme That Catalyzes the Decomposition of Urea $k = A \exp \left( - \frac { E _ { a } } { R T } \right)$

Urease is an enzyme that catalyzes the decomposition of urea to ammonia and carbon dioxide. The rate constant for the uncatalyzed reaction is 4.0*10^-11/s at 22°C. Urease increases the rate constant to a value of 8.0 *10^-5/s. Use the Arrhenius equation, which is given below, to determine the difference in the activation energies E_uncatalyzed - E_catalyzed. (R = 8.315 J / (mol K) ) $k = A \exp \left( - \frac { E _ { a } } { R T } \right)$

A) 23 kJ/mol
B) 2.3 kJ/mol
C) 15 kJ/mol
D) 36 kJ/mol
E) 51 kJ/mol