Step-by-step explanation:
A) Food and Nutritional Board of the National Academy of Sciences-National Research Council.
The Food and Nutrition Board (FNB) of the National Academy of Sciences-National Research Council established the Recommended Dietary Allowances (RDAs) in 1943. The RDAs provide guidance on the amount of nutrients that are needed daily by the average healthy person to maintain good health. The RDAs are periodically reviewed and revised to reflect the latest scientific knowledge on nutrition. Today, the FNB is part of the National Academies of Sciences, Engineering, and Medicine and continues to provide guidance on nutrition and dietary intake