Final answer:
RDAs and AIs are used for identifying the average amount of nutrients required by healthy individuals. Hence the correct answer is option A
Step-by-step explanation:
RDAs and AIs are used for identifying the average amount of nutrients required by healthy individuals. RDAs, or Recommended Dietary Allowances, are the levels of intake of essential nutrients that are sufficient to meet the nutrient requirements of most healthy individuals. AIs, or Adequate Intakes, are used when there is insufficient evidence to establish an RDA. They represent an approximation of the nutrient intake that appears to sustain a defined nutritional state.
Hence the correct answer is option A