A 22-year-old man presents to his physician complaining of nasal congestion. Rhinoscopy demonstrates focal inflammation with mucosal edema in the inferior nasal meatus. Drainage from which of the following structures is most likely to be obstructed?
a. Anterior ethmoidal air cells
b. Frontonasal duct
c. Maxillary sinus
d. Nasolacrimal duct
e. Posterior ethmoidal air cells