A patient presents for treatment of a large fluctuant mass in the submandibular space as a result of extension of odontogenic infection. He has a temperature of 38.5 degrees C (101 degrees F). Initially, the dentist should treat this patient with which of the following?

incision and drainage and a culture for antibiotic sensitivity

antibiotic therapy to reduce the swelling and infection

alternate application of heat and cold to the area to improve circulation

salicylate therapy to reduce the temperature