The purpose of the dietary guidelines for americans is to (1) provide information on making smart food choices, (2) balance food intake with physical activity, (3) get the most nutrition out of the calories you consume, and one other important factor. which activity demonstrates the fourth purpose of the guidelines? 1.ignoring a 30-day cabbage-only fad diet in order to lose weight 2.calculating your bmi 3.comparing the contents of the chips and whole wheat crackers you want to buy 4.washing your hands thoroughly after seasoning raw chicken