What Are Conditionally Essential Amino Acids

What are conditionally essential amino acids?

A) Those amino acids that are synthesized by the body in excess quantities
B) Those amino acids that cannot be synthesized by the body at all and should be taken in through the diet to meet the required amounts
C) Those amino acids that are normally nonessential but must be supplied through the diet when the need for it exceeds the body's ability to produce it
D) Those amino acids that are easily synthesized by the body and are not required to be consumed through the diet
E) Those amino acids that are required by the body in minute quantities