NAD, FAD, and Coenzyme A (CoA) are molecules that are involved in cellular respiration.

Which of the following statements about these molecules is/are correct?

1. Both NAD and FAD function as coenzymes that transport hydrogen atoms to the electron transport chain.
2. FAD is reduced during both glycolysis and the Krebs cycle.
3. Coenzyme A (CoA) reacts with a 2-carbon acetyl group during the link reaction to form acetyl CoA.