If daily dietary fat intake is reduced to extremely low levels over time, what physiological impairment is expected?

Zero-calorie foods like artificial sweeteners are often used in diet plans for:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: The Recommended Dietary Allowance (RDA) of a specific nutrient is established at a numerically higher intake level than its corresponding Estimated Average Requirement (EAR). Reason R: While the EAR is calculated to meet the nutritional needs of only 50% of healthy individuals in a life stage group, the RDA is set at a level sufficient to meet the requirements of nearly all (97-98%) healthy individuals in that same group. In the light of the above statements, choose the most appropriate answer from the options given below: