Self antigens [it's how your body detects its own cells from a foreign invaders]?
A. Trigger an immune response
B. Do not trigger an immune response
C. Wage a war against all other antigens in your body
D. Wage a war against all other antibodies in your body
E. None of the above

lifetime activities are certain actions that are either required throughout your life or you choose to do them. for example, eating is considered a lifetime activity, drinking water or other beverages, keeping your body clean, taking medicine. those types of actions are considered lifetime activities.