The RDA is (A) the average amount of a nutrient required each day to maintain normal function in 50% of the U.S. population. (B) the average amount of a nutrient ingested daily by 50% of the U.S....

The RDA is

(A) the average amount of a nutrient required each day to maintain normal function in 50% of the U.S. population.

(B) the average amount of a nutrient ingested daily by 50% of the U.S. population.

(C) the minimum amount of a nutrient ingested daily that prevents deficiency symptoms.

(D) a reasonable dietary goal for the intake of a nutrient by a healthy individual.

(E) based principally on data obtained with laboratory animals.