Which of the following are characteristic of carbohydrates? Select all that apply.

A)The monomer subunits are called amino acids.
B)The monomer subunits are constructed primarily from carbon,hydrogen,and oxygen.
C)Carbohydrates provide an immediate source of energy for cells.
D)Starch is a carbohydrate found specifically in fungi.
E)Chitin is a carbohydrate found in the exoskeletons of crabs and other similar animals.