Desensitization of an Individual with Allergies by Injecting Small Amounts

Desensitization of an individual with allergies by injecting small amounts of the allergen under the skin is effective because it ________.

A) induces the formation of IgG antibodies that bind the the allergen before it is able to bind to the IgE associated with mast cells
B) prevents IgE antibodies from being formed,thus eliminating the degranulation of mast cells
C) changes the nature of the allergy from a type I to a type III,which is easier to treat
D) induces the formation of IgA antibodies,which are secreted into the tissues,reducing the amount of degranulation by mast cells in the blood