What is a significant advantage to the cell in having pyruvate dehydrogenase consist of a large, multi-enzyme complex?

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.