mekomba
Answered

Allergies are caused by which of the following?

A. Ingesting IgA in breast milk
B. Strong toxins in the environment
C. Autoimmune diseases
D. Reactions to antigens



Answer :

Allergies are caused by D. reactions to antigens. Antigens are some kinds of toxins that can cause a reaction in your body, and that reaction is usually in the form of an allergy. The other options do not really have much to do with allergies, but rather other forms of diseases and illnesses.