A district wants to measure the impact of a new adolescent nutrition intervention targeting peer influence and family meals. Which set of outcome metrics would best capture nutrition-related changes over one school year?

• A. Frequency of family meals per week, percent of students reporting fast-food consumption twice or more per week, change in average fruit and vegetable servings per day, and BMI percentile changes and self-reported disordered eating screening scores.
• B. Only academic test scores and teacher-reported classroom behavior, since nutrition programs primarily affect cognition without measurable dietary or anthropometric outcomes.
• C. Number of vending machines in the district and annual cafeteria revenue, but not any student-reported dietary intake or BMI measures, because revenue is the primary proxy for diet quality.
• D. Monthly counts of missed school buses and average sleep duration, as these are direct indicators of adolescent dietary intake changes following interventions.

Answer: (A)