21. When heat is added to proteins, the hydrogen bonding in the secondary structure breaks apart. What are the algebraic signs of ΔH and ΔS for the denaturation process? (A)Both ΔH and ΔS are positive. (B)Both ΔH and ΔS are negative. (C)ΔH is positive and ΔS is negative. (D)ΔH is negative and ΔS is positive. (E)ΔΗ is positive and ΔS is 0.