Answer:
a) avoiding all dairy products containing lactose.
b) taking lactase enzyme tablets when consuming lactose products
e) taking lactase enzyme tablets or avoiding all dairy products
Step-by-step explanation:
When a baby become 2 to 5 year old the production of most of the lactase stops so the undigested lactose gets into the colon where it acts as substrate for the lactic acid bacteria which produce lactic acid, CO2 and cause painful gas, bloating, nausea, diarrhea, etc.
So for avoiding this problem, lactose-containing dairy products should be avoided by lactose intolerant person or they can take lactase enzymes containing tablets after consuming lactose products because the lactose will be digested by the lactase enzyme which is present in the tablet and no lactose will be remained for lactose fermenting bacteria.