Answer: C. 0.3
Explanation: The Acceptable Macronutrient Distribution Range (AMDR) usually expressed as percentage of total daily intake of energy is defined as the range of intakes for a particular energy source (protein, fat, carbohydrate etc) that is associated with reduced risk of chronic disease while providing adequate intakes of essential nutrients required by the body. For proteins this is within the range of 10 to 35%, expressed as fraction, 0.1 to 0.35. Option C falls within this range and therefore is the correct answer.