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Final answer:The amount of vitamin C that meets 98% of the population's needs is the Recommended Dietary Allowance (RDA). RDA is calculated using the Estimated Average Requirement (EAR) and provides for the nutritional needs of nearly all individuals. The correct option is (c).Explanation:The amount of vitamin C that meets the requirement for 98% of the population's nutrient need is the Recommended Dietary Allowance (RDA) for the vitamin. The RDA is a vital measure used by professionals to evaluate the quality and adequacy of people's diets, and it considers the nutritional needs of nearly the entire population (97.5%).In contrast to the RDA, the Estimated Average Requirement (EAR) is the average daily nutrient intake level estimated to meet the requirements of half of the healthy individuals in a particular life stage and gender group. The RDA is determined based on the EAR, with an additional margin to cover the needs of nearly all healthy individuals in the demographic group. Since the RDA accounts for the variability in the population's needs, it is generally set higher than the EAR.Another measure related to nutrition intake is the Tolerable Upper Intake Level (UL), which refers to the maximum daily intake unlikely to cause harmful effects for almost all individuals in the general population. The Percent Daily Value (%DV) indicates how much of a nutrient a serving of food contributes to a daily diet and is based on a 2,000-calorie-a-day diet....