I think the answer is b as in boy.
During the krebs cycle NADH (Nicotinamide adenine dinucleotide) and FADH (<span>Flavin adenine dinucleotide) are made and used in the electron transport chan. Hope this helps!</span>
Answer:
C
Explanation:
Please consider Brainiest : )
The first one, cause their trying to make it a positive way to reinforce. Which just means their trying to fix something again