If i knew it i would tell you
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:
B. Because it doesn't have enough concrete evidence. its a thought but not put into full view
Answer:
the white blood cells, part of the immune system, system that tailors the body's immune response to specific pathogens
Explanation:
