I think the answer is C) R I had this question and that was right for me hope this helps!
It’s critical because it checks the cell for problems or mutations that could potentially harm it in later steps or make it like burst lol
Answer:
An inherited life-threatening disorder that damages the lungs and digestive system.
Cystic fibrosis affects the cells that produce mucus, sweat and digestive juices. It causes these fluids to become thick and sticky. They then plug up tubes, ducts and passageways.
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Explanation: