Final answer:
Approximately 90% of carbohydrates are digested and absorbed in the digestive system. Carbohydrates are chemically digested through the action of digestive enzymes, such as salivary amylase and pancreatic amylase. The correct answer is c).
Step-by-step explanation:
The approximate percentage of carbohydrates that are digested and absorbed is 90%.
One way in which carbohydrates are chemically digested in the digestive system is through the action of digestive enzymes. In the mouth, salivary amylase starts breaking down complex carbohydrates into smaller molecules. In the small intestine, pancreatic amylase further breaks down carbohydrates into their monomers, such as glucose, before they are absorbed into the bloodstream.