26. In the TCA cycle, a role for thiamine pyrophosphate is which one of the following?(A) To accept electrons from the oxidation of pyruvate and a-ketoglutarate(B) To accept electrons from the oxidation of isocitrate(C) To form a covalent intermediate with the a-carbon of a-ketoglutarate(D) To form a thioester with the sulfhydryl group of CoASH