the activation energy of a reaction going on its own is 20 kj. if the reaction was treated with a catalyst…

the activation energy of a reaction going on its own is 20 kj. if the reaction was treated with a catalyst, which would most likely represent the amount of energy needed to start a reaction?\n15 kj\n20 kj\n25 kj\n30 kj
Answer
Brief Explanations:
Catalysts lower the activation energy of a reaction. Since the original activation energy is 20 kJ, with a catalyst, the activation energy will be less than 20 kJ. Among the options, 15 kJ is the only value less than 20 kJ.
Answer:
A. 15 kJ