If proteins, carbohydrates and fats are consumed together:

(A) The total SDA is the sum of individual SDAs
of proteins, carbohydrates and fats
(B) The total SDA is more than the sum of
individual SDAs of proteins, carbohydrates
and fats
(C) Carbohydrates and fats lower the SDA of
proteins
(D) Proteins raise the SDA of carbohydrates and
fats