Antigens are molecules that the immune system recognizes as foreign to the body, and rejection is a normal reaction of the body to a foreign object. Given these facts, antigens are molecules that the immune system recognizes as needing to be what among the following options:
- welcomed into the body
 - it needs them
 - stored in the body
 - accepted into the body
 - major threat to health
 - Something that causes allergies
 - rejected from the body
 - members of their own species


 

       rejected from the body  