Final answer:
Carlos can most readily use glucose as a source of fuel after an exhausting workout since it is a monosaccharide that is directly usable by cells for energy production. Other carbohydrates like cellulose and polysaccharides are not immediately available sources of energy as they require digestion into monosaccharides first. The answer is option D.
Step-by-step explanation:
After an exhausting workout, the type of carbohydrate that Carlos can most readily use as a source of fuel is glucose. Glucose is a monosaccharide that is directly used by the cells in the body for energy.
It is rapidly absorbed into the bloodstream and can be quickly metabolized to produce ATP, which is the cellular energy currency. In contrast, cellulose and dietary fiber are not digestible by humans, and while polysaccharides can be a source of glucose, they require digestion into their monosaccharide components before they can be used by the body, which is not as immediate as consuming glucose.
Cellulose, the main component of dietary fiber, is not digested by the human digestive system and thus does not provide a quick source of energy. Similarly, any kind of polysaccharide, such as starch and glycogen, needs to be broken down into glucose through digestive processes, which takes more time compared to direct glucose intake. Therefore, glucose is the best choice for quick energy replenishment after an exercise session.