The Isomerization of Methyl Isocyanide, CH₃NC $\rarr$ CH₃CN, Follows First-Order Kinetics $\circ$

The isomerization of methyl isocyanide, CH₃NC $\rarr$ CH₃CN, follows first-order kinetics. The half-lives were found to be 161 min at 199 ^$\circ$ C and 12.5 min at 230 ^$\circ$ C. Calculate the activation energy for this reaction.

A) 6.17 * 10^-3 kJ/mol
B) 31.4 kJ/mol
C) 78.2 kJ/mol
D) 124 kJ/mol
E) 163 kJ/mol