20. Which statement about heterogeneous catalysis is correct?
(A) Catalytic activity originates primarily from the bulk atoms of the solid catalyst
(B) Adsorption of reactants on the catalyst surface increases the activation energy of the reaction
(C) Surface defects, edges, and corners often serve as active sites for catalysis
(D) The catalyst is consumed during the reaction to form the product
(E) The reaction rate in heterogeneous catalysis is independent of the catalyst surface area

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