C is the answer ( I think)
Answer:
When prostaglandin is released, the nerve endings respond to it by picking up and transmitting the pain and injury messages through the nervous system to the brain. They tell the brain everything about the pain, like where it is and how much it hurts.
Explanation:
B, sometimes people think it wastes too much time
True pathogens are disease causing agents
It has greatly effected the life expectancy by introducing new machines used to cure/ research diseases.
