People who have severe allergies may need to have a treatment called which involves either having injections (shots) that are given regularly and over an extended period of time, or it can be taking a pill that is placed under the tongue until it dissolves (which is called sublingual).

The answer is: Allergen immunotherapy

Explanation:

Allergen immunotherapy, or desensitization, is a medical treatment that is used in the prevention of serious medical conditions such as asthma and environmental allergies.

In this treatment, the patient is exposed to large amounts of the allergens via shots (injections) or sublingual immunotherapy (allergy tablets), which ultimately changes the response of the immune system and thus leads to the prevention of the disease.

i think the answer would be b.