The First-Order Reaction a → Products Has a Half-Life,t_1/2,of 55

The first-order reaction A → Products has a half-life,t_1/2,of 55.0 min at 25 °C and 6.8 min at 100 °C.What is the activation energy for this reaction?

A) -25.8 kJ/mol
B) -38.8 kJ/mol
C) 347 kJ/mol
D) 25.8 kJ/mol
E) 38.8 kJ/mol