Why Is the Fatty Acid Oxidation Pathway Also Referred to as The \beta

Why is the fatty acid oxidation pathway also referred to as the $\beta$ -oxidation pathway?

A) The carbon adjacent to the fatty acyl-CoA reacts with oxygen.
B) The pathway utilizes NAD⁺ and FAD as cofactors.
C) A carbon atom that is two carbons away from the carboxylic acid end of the fatty acid chain is oxidized.
D) The resulting products are referred to as $\beta$ -bodies.