At 30 ^$\circ$ C, by How Much Is a Reaction's Activation Energy Decreased

Multiple Choice

At 30 ^$\circ$ C, by how much is a reaction's activation energy decreased by the addition of a catalyst if the catalyst triples the reaction rate

A) 2.77 kJ/mol
B) 274 J/mol
C) 2.70 J/mol
D) 119 J/mol
E) 1.20 kJ/mol