48. When heat is added to proteins, the hydrogen bonding in the secondary structure breaks apart.What are the algebraic signs of△H and△S for the denaturation process?
(A)△H is negative and △S is positive
(B) both △H and△S are negative
(C) △H is positive and △S is O
(D)both △H and △S are positive
(E) △H is positive and△S is negative