Which is the best source of complex carbohydrates?

• A. Fish
• B. Vegetables
• C. Red meat
• D. Whole-grain bread

Answer: (D)

Complex carbohydrates come from plant foods that include starches and fiber, and they digest slowly to provide steady energy and better blood sugar control during sustained activity. Whole-grain bread is the best source among these options because it uses the entire grain, retaining the bran and germ, which means more fiber, vitamins, and minerals. That fiber slows digestion and the glucose release, helping maintain energy during demanding work. Fish and red meat provide virtually no carbohydrates, and vegetables do contain some carbs but are less concentrated sources of complex carbs than a serving of whole-grain bread.