Essential Amino Acids Differ from Nonessential Amino Acids in That

Essential amino acids differ from nonessential amino acids in that:

A) nonessential amino acids are synthesized in simple reactions compared to many for most essential amino acids.
B) essential amino acids are generally synthesized directly from citric acid cycle intermediates, but nonessential amino acids are not.
C) microorganisms and animals cannot synthesize essential amino acids but plants can.
D) animals cannot synthesize essential amino acids because they have lost the ability to carry out transamination reactions.
E) None of the above.