What type of carbohydrates take longer to digest and provide sustained energy?

Complex carbohydrates are the correct choice because they consist of long chains of sugar molecules, which makes them take longer for the body to break down during digestion. This slow digestion process results in a gradual release of glucose into the bloodstream, providing a more sustained source of energy. Examples of complex carbohydrates include whole grains, legumes, and starchy vegetables.

In contrast, simple carbohydrates, including sugars, are made up of shorter chains of sugars or single sugar units. They are quickly digested and absorbed, leading to rapid spikes in blood sugar levels and a quick burst of energy that may not last long. Fibers, while beneficial for digestive health, do not provide significant calories and are not directly metabolized for energy in the same way as complex carbohydrates. Thus, they serve different dietary functions.