Given the Following Data for the Reaction A $\to$ B,determine the Activation Energy,E_a,of the Reaction to Three Significant Figures

Given the following data for the reaction A $\to$ B,determine the activation energy,E_a,of the reaction to three significant figures.

A) 48.7 J/mol
B) 6.90 J/mol
C) 405 J/mol
D) 9.95 kJ/mol
E) 2.05 $\times$ 10^-2 kJ/mol