9yo Tom is in the clinic for a "cold" that lasted for 10 days. He has no complaints of breathing problems. A physical exam reveals temp of 100F, edematous cervical lymph nodes, mucopurulent drainage from the middle meatus, erythematous pharynx & malodorous breath. Tom's management should include:
a. culture of nasal drainage
b. radiograph of the sinuses
c. measurement of erythrocyte sedimentation rate
d. use of an antibiotic