Answer: Option 'D' is correct.
Step-by-step explanation:
Colonization refers to the presence of bacteria on the surface of body without causing any disease in the body.
It just caused swelling and stimulate inflammation to the mucous membrane.
Swelled and inflamed mucous membranes are usually indicators of bacteria colonization.
During colonization of bacteria, it stimulates inflammation and makes the mucous membranes swelled because mucous membranes produce more fluid at that time.
Hence, Option 'D' is correct.