The correct answer is c) glucose.
Simple carbohydrates are sugars that consist of one or two sugar molecules. Glucose is a monosaccharide, which means it is a single sugar molecule and is the simplest form of carbohydrate. It is quickly absorbed by the body and provides immediate energy. In contrast, fiber (a), grains (b), and artificial sweeteners (d) do not fall under the category of simple carbohydrates. Fiber is a complex carbohydrate that the body cannot digest, grains typically contain multiple types of carbohydrates, and artificial sweeteners are sugar substitutes that do not fit the definition of a carbohydrate.