Complex carbohydrates: a. are small molecules containing six carbon atoms b. are long chains of sugar units arranged to form starch or fiber c. include both single sugar units and linked pairs of sugar units

b. are long chains of sugar units arranged to form starch or fiber

Explanation:

Complex carbohydrates are carbohydrates that are made up several sugar molecules that link together to form a long chain. Complex molecules provide a more lasting energy to the body as a result of their long chains which takes time to be broken down as they are converted to glucose in the blood. Examples of food that contain complex molecules include, beans, Fiber-rich vegetables, Fiber-rich fruits, whole grains, peas.

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