Which of the Following Statements Is a Symptom of Cystic

Which of the following statements is a symptom of cystic fibrosis in children?

A) Cystic fibrosis leads to uncontrollable muscle movements and personality change.
B) Cystic fibrosis leads to the excessive production of thick mucus that clogs the pancreas and lungs.
C) Cystic fibrosis causes red blood cells to clump together, obstructing small blood vessels and decreasing the oxygen supply.
D) Cystic fibrosis causes the central nervous system to degenerate, resulting in death.