You Have a Patient Who Is a Positive for Strep

You have a patient who is a positive for Strep on rapid antigen testing (rapid strep test) .You order amoxacillin after checking for drug allergies (patient is negative) but he returns 3 days later, reporting that his temperature has gone up, not down (101.5 °F in office) .You also note significant adenopathy, most notably in the posterior and anterior cervical chains, some hepatomegaly, and a diffuse rash.You decide:

A) to refer the patient.
B) that he is having an allergic response and needs to be changed to a macrolide antibiotic.
C) that his antibiotic dosage is not sufficient and should be changed.
D) that he possibly has mononucleosis concurrent with his strep infection.