In what way do simple carbohydrates differ from complex carbohydrates?

Simple carbohydrates differ from complex carbohydrates primarily in the speed at which they are broken down and absorbed by the body. They are composed of shorter chains of sugar molecules, which allows them to be digested quickly. This rapid breakdown leads to a swift release of glucose into the bloodstream, providing immediate energy for the body.

In contrast, complex carbohydrates are made up of longer chains of sugar molecules, which require more time for the body to digest and convert into glucose. As a result, they provide a more sustained release of energy over a longer period. This distinction is crucial for understanding how different types of carbohydrates can affect energy levels and metabolic processes.

The other options highlight characteristics that do not accurately represent the differences between simple and complex carbohydrates. For example, while some simple carbohydrates can provide quick energy, it is not accurate to generalize that they all lack nutritional value, as certain simple carbohydrates like fruits contain vitamins and minerals. Thus, option C correctly identifies the key difference in how quickly simple carbohydrates can provide energy compared to complex carbohydrates.