16. Acyl carrier protein (ACP) is an important part of fatty acid biosynthesis because: (A) ACP binds the final product of fatty acid synthase to transport it to other places in the cell. (B) ACP connects the acetyl-CoA carboxylase with fatty acyl chain. (C) ACP covalently links with the acyl group from one active site to another in sequence. (D) ACP is essential only for the thioesterase activity that releases the product fatty acid from the enzyme. (E) ACP provides a way to store pantothenic acid when abundant so it is available during times when the amount of this vitamin in the diet is inadequate.