Which respiratory disease causes airways to narrow or become blocked when dust, smoke, or cold air is present?%0D%0A%0D%0A%0D%0Abronchitis%0D%0A%0D%0A%0D%0Aasthma%0D%0A%0D%0A%0D%0Asleep apnea%0D%0A%0D%0A%0D%0Acystic fibrosis

Asthma