Which of the Following Processes Would Be Most Directly Impacted

Multiple Choice

Which of the following processes would be most directly impacted from a lack of niacin in the body?

A) The movement of high-energy electrons with the help of NAD+ to the electron transport chain
B) The movement of pyruvate into the mitochondria after glycolysis
C) The movement of acetyl CoA through the citric acid cycle
D) The excretion of proteins from cells