The type of immunity that uses both helper and killer cells is Cellular Immunity. It is used by Cellular immunity to classify the abnormal cells. Once abnormal cells are detected it is destroyed by Cellular Immunity. Cellular Immunity serve as resistance from diseases caused by viruses.
That situation is a tricky situation...i wish i knew myself.
Answer:
It is D: a person panics in elevators and therefore avoids them.
Explanation:
I have a phobia my self called katsaridaphobia