Answer :
D) Supportive treatment best treatment for this patient.
Supportive treatment is the best option for an adult with a mild, non-worsening cough without severe symptoms, emphasizing rest and hydration. Antibiotics are unnecessary in this case. The focus is on alleviating symptoms rather than addressing an undiagnosed bacterial infection.
Supportive treatment typically includes rest, hydration, and possibly over-the-counter cough suppressants or decongestants. Since the symptoms are mild and have not worsened, antibiotics like Amoxicillin, Azithromycin, and Cephalexin are unnecessary unless an underlying bacterial infection is identified.
