Use the Following Information to Answer the Questions Below

Use the following information to answer the questions below.
In the presence of oxygen,the three-carbon compound pyruvate can be catabolized in the citric acid cycle.First,however,the pyruvate (1) loses a carbon,which is given off as a molecule of CO₂,(2) is oxidized to form a two-carbon compound called acetate,and (3) is bonded to coenzyme A.
-Why is coenzyme A,a sulphur-containing molecule derived from a B vitamin added to acetate?

A) because sulphur is needed for the molecule to enter the mitochondrion
B) in order to utilize this portion of a B vitamin that would otherwise be a waste product from another pathway
C) to provide a relatively unstable molecule whose acetyl portion can be readily transferred to a compound in the citric acid cycle
D) because it drives the reaction that regenerates NAD⁺
E) in order to remove one molecule of CO₂