Identify the accurate statement from the following:

Explanation

Option A is correct because a catalyst speeds up a reaction without affecting the overall enthalpy change (ΔH). Option B is incorrect since catalysts do not shift the equilibrium position. Option C is wrong because the law of mass action was formulated by Guldberg and Waage, not Le Chatelier. Option D is incorrect because activation energy refers to the energy barrier that must be overcome to start a reaction, not simply the difference in energy between reactants and products.