I believe the answer is a.
The answer would be D, disease diagnosis.
A normal person can't medically diagnose themselves with a disease.
Hope this helps!
I don't see anything following this, however the growth of bacteria is due to people not washing their hands or cuaghing on others and/or doing other things that are unsanitary.
Answer:
Chest pain can have causes that aren't due to underlying disease. Examples include heavy lifting, weight lifting, trauma to the chest, or swallowing a large piece of food.
Explanation:
