A serving of food supplies 18 g protein, 20 g carbohydrate, 7 g of fat, 18 mg vitamin E, 2 mg iron, and 100 g water. Which of the following statements is true about serving of the food?
a) Carbohydrates provide the most food energy.
b) Protein supplies the highest amount of calories.
c) Fat content contributes the most to the serving's energy.
d) Vitamin E has the highest concentration in the serving.
