Which of the Following Statements Is True of Proteins

Which of the following statements is true of proteins?

A) Most of the proteins from animal foods lack the essential amino acids that humans require.
B) Proteins are needed for growth, maintenance, and repair of all body tissues.
C) Proteins are used by the body as a primary source of energy.
D) Fruits, fruit juice, honey, and sugar are potential sources of proteins for vegetarians.