People with celiac disease . take amino acids supplements. b. limit their protein intake to 20g per day. c. avoid foods that contain gluten. d. eliminate protein from plant sources.

The correct answer is option C. avoid foods with gluten.

Explanation:

Celiac disease is a disease in which people affected with this disease can not  eat gluten or gluten rich food as it will damage their small intestine. In the celiac disease the ability of absorbing can be affected as the gluten damage the lining or vili of the small intestine which barred to absorb some macronutrients.

People with celiac disease should avoid foods with gluten as it can cause several symptoms like belching, nausea, fat stool and other symptoms.

Thus, the correct answer is option C. avoid foods with gluten.

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls