Final answer:
Sports drinks, bran flakes, and bananas are good sources of carbohydrates to eat immediately before exercise, but bagels are not recommended.
Step-by-step explanation:
Carbohydrates are an important source of energy for the body, especially for athletes before exercise. However, not all carbohydrates are equally beneficial before physical activity. While sports drinks, bran flakes, and bananas are good sources of carbohydrates to eat immediately before exercise, bagels are not a recommended choice.