The CFTR chloride anion channel is altered in cystic fibrosis patients and causes:

A. Less chloride anion and water to be secreted from lung cells causing the mucous in the lungs to thicken and this then causes bacteria to get trapped in the sticky mucous
B. More chloride anion and water to be secreted from lung cells causing the mucous in the lungs to thin out and this then causes bacteria to get trapped in the sticky mucous
C. Less zinc and lead anions and water to be secreted from lung cells causing the mucous in the lungs to thicken and this then causes bacteria to get trapped in the sticky mucous
D. Less chloride anion and water to be secreted from lung cells causing the mucous in the lungs to thin out and this then causes fewer bacteria to get trapped in the sticky mucous