Which of the following best describes the relationship between the shape of enzymes and the reactions they catalyze? (2 points) Select one: a. The shape of an enzyme depends on the reaction that it needs to catalyze. b. Enzymes with more active sites can catalyze several reactions at once. c. The shape of an enzyme determines which reaction it can catalyze. d. Enzymes change shape after they catalyze a reaction and become waste products.