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Sagot :
Answer:
Option B.
Explanation:
Cystic fibrosis is caused by a defective gene which causes the lungs and the digestive system to become clogged with sticky mucus resulting the inflammation of the lungs thereby causing difficulty in breathing.
The answer should be A or B because cystic fibrosis can cause both, it affects breathing and those who have it don’t live long since there is no cure or treatment
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