Lactose Is Milk Sugar, and Humans Produce Substantial Lactase Enzyme

Multiple Choice

Lactose is milk sugar, and humans produce substantial lactase enzyme to digest it when we are infants. However, we soon lose some or even all of our lactase after childhood. In such cases, undigested lactose passes to the lower intestine where bacteria break it down into lactic acid and CO₂, causing painful gas and bloating. This problem could be avoided by

A) avoiding all dairy products containing lactose.
B) taking lactase enzyme tablets when consuming lactose products.
C) taking any enzyme tablets when consuming dairy products.
D) consuming lactose in tablet form.
E) Both taking lactase enzyme and avoiding all dairy products would be correct.