Lactose intolerance is caused by:

A. inadequate exposure to dairy products
B. too much lactase in the diet
C. the lack of or reduction of the enzyme lactase
D. lack of hydrochloric acid in the gut lack of amylase

C

Explanation:

Lactose intolerance occurs when your small intestine doesn't produce enough of an enzyme (lactase) to digest milk sugar (lactose). ... If you're lactase deficient, lactose in your food moves into the colon instead of being processed and absorbed

the correct answer is b

the answer is c. it will give up it's valence electron to the other atom.