According to the National Institutes of Health (NIH) Guidelines, When

According to the National Institutes of Health (NIH) guidelines, when classifying asthma severity a component of severity known as "risk" needs to be considered. "Risk" refers to which of the following?

A) Number of asthma exacerbations requiring oral corticosteroids within a certain period of time
B) Family history of asthma, allergic rhinitis, or atopic dermatitis
C) Child's exposure to environmental triggers such as tobacco smoke, air pollution, or toxins
D) Past health history of prematurity, gastroesophageal reflux, or wheezing in the first year of life