Answer:
C
Step-by-step explanation:
Proteases are produced by cells in the stomach
Saliva is produced by the salivary glands in the mouth
Balance of water is regulated by the kidney. If a person's kidney fails, this function will be impeded. Excess water cannot be expelled from the body in the form of urine.
Carbohydrates are digested by enzymes secreted by salivary glands and small intestine.