Answer:
C
Explanation:
Its Slamonella as bacteria would thrive if the food was not eaten by due date and eating expired food is unhealthy for you. Hope this helps :)
So its acquired immunity and the cells responsible are the B lymphocytes that produces antibodies against the virus. Memory is keep since first encounter of the virus by the immune system by way of the antibodies that was initially produced. The antibodies are there already, which makes it fast to act upon when expose again.
D. lung cancer is the most common cause of cancer death.
