There Are Four Classes of Organic Nutrients

There are four classes of organic nutrients. Which of following correctly characterizes the given energy nutrient?

A) Carbohydrates-provide the body with an immediate source of energy
B) Lipids-structural components of hair, fingernails, and claws
C) Proteins-have three forms: monosaccharides, disaccharides, and polysaccharides
D) Carbohydrates-composed of amino acids bound together with peptide bonds
E) Proteins-make up the bulk of the plasma membrane of cells