Which Statement Best Describes Why Proteins Are Not Synthesized into Storage

Which statement best describes why proteins are not synthesized into storage molecules?

A) Proteins denature too easily.
B) The body has no enzymes that can break down proteins.
C) Proteins cannot be stored because their peptide bonds cannot be broken.
D) Proteins primarily have a structural function in connective tissues and play many functional roles such as enzymes and hormones.
E) Proteins cannot be stored because they produce toxic waste products.