The patient is a 7-year-old female who experienced a sudden onset of coughing and expiratory wheezing about 20 minutes ago. She has no history of pulmonary or cardiovascular disease. She states that she was eating peanuts immediately before the onset of the symptoms and that she "almost choked on one." Auscultation of her chest reveals localized wheezing in the right lung field. She is MOST

likely suffering from:

a. an acute asthma attack.
b. anaphylaxis.
c. aspiration of a foreign body into the lower airways.
d. pneumonia.

c