Answer:
The correct answer is option C, block messages within the nervous system
Explanation:
Whenever our body gets injured, the damaged cells in it releases a chemical known as “prostaglandin” which sends pain signals through the nerves to the brain. Now when a pain reliever is injected in the body, it stops the production of prostaglandin. As the chemical production stops, no pain messages are send to the brain and thus the pain goes away
