Lactose Is a Disaccharide of Glucose and Galactose, and Its

Lactose is a disaccharide of glucose and galactose, and its digestion requires the actions of the enzyme lactase. If lactose is eaten as part of the diet but is not digested by lactase, this sugar is then metabolized by bacteria in the intestine, leading to the symptoms of lactose intolerance. Lactose intolerance, therefore, results from a(n)

A) inability of the body to produce lactose.
B) low blood lactose level.
C) lack of dehydration synthesis of lactose.
D) lack of hydrolysis of lactose.