Cystic fibrosis is a disease that .causes all those infected to live only into their teen yearsb. makes it difficult to breathec. can be cured with proper medicationd. occurs most frequently in people of asian descent

Option B is correct

Explanation:

Cystic fibrosis which is also known as CF, mucovoidosis, or mucoviscidosis 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.

Cystic fibrosis is a genetic condition. Cystic fibrosis can't be caught or developed; it can only be caused by inheriting two copies of the faulty gene.

d is the answer hope this