His parents tell you that their son has had a chest infection for the past two days and when they took him to their family doctor, they were told it was likely due to the respiratory syncytial virus (rsv). they have kept him well hydrated, but the infection seems to have gotten worse

The appropriate response is bronchiolitis. Bronchiolitis is a typical ailment of the respiratory tract. It's caused by a contamination that influences the modest aviation routes, called the bronchioles, that prompt the lungs. As these aviation routes wind up noticeably kindled, they swell and load with bodily fluid, which can make breathing troublesome.

The answer is b, as with an inference you make a statement with no evidence