Which of the following statements is true?
a) Nutrition scientists have established Adequate Intakes (AIs) for all critical nutrients.
b) The Estimated Energy Requirement (EER) represents the average energy needs of a healthy person.
c) People who consume 95% of the Recommended Dietary Allowance (RDA) for vitamin A regularly have a high risk of developing signs and symptoms of vitamin A deficiency.
d) People who consume less than the Tolerable Upper Intake Level (UL) for calcium have a higher than average risk of developing calcium toxicity.