A 60 kg high-performance athlete completes a 90-minute training session and, within 30 minutes, consumes a snack containing 45 g carbohydrate and 15 g protein. Using an assumed mid-range daily carbohydrate target of 8 g/kg for this athlete, analyze whether (a) the snack meets the 3:1 carbohydrate-to-protein mass ratio and (b) whether the snack alone provides a substantial portion of the athlete's daily carbohydrate requirement. Choose the correct evaluation.

• A. Yes, it meets both the 3:1 ratio and provides over 90% of the daily carbohydrate requirement because short-term snacks can replace daily intake efficiently without multiple meals.
• B. No, it fails the 3:1 ratio; Yes, it provides the majority (>50%) of the day's carbohydrates and therefore fully replenishes glycogen stores.
• C. Yes, it meets the 3:1 ratio; No, it provides only about 9.4% of the day's carbs and is insufficient alone for full glycogen restoration.
• D. No, it neither meets the 3:1 ratio nor provides any meaningful carbohydrate because post-exercise windows only accept liquid carbohydrates and not whole-food sources like snacks.

Answer: (C)