Final answer:
People should obtain about 50-70% of their daily energy from carbohydrates, with a focus on complex carbohydrates for sustained energy and nutritional benefits.
Step-by-step explanation:
According to the Dietary Reference Intakes, people should obtain about 50-70 percent of their daily energy from carbohydrates. Therefore, the correct answer is C. 50-60%. This recommendation aligns with guidelines from health organizations such as the American Heart Association, which advises that approximately 55% of your daily calories should come from carbohydrates, particularly complex carbohydrates. Complex carbohydrates are preferred because they are broken down more slowly by the body, providing a longer and more steady supply of energy, and they often come with additional nutrients like vitamins and minerals. Simple sugars, although also carbohydrates, should be limited as they do not offer these nutritional benefits and are often devoid of fiber.