A 7-month-old child presents with a 4-day history of fever, deepening cough, and dyspnea. A chest x-ray film shows multiple interstitial infiltrates and hyperinflation of the lungs. Multinucleated giant cells with cytoplasmic inclusion bodies are seen when a nasal wash is inoculated into tissue culture. The most appropriate therapy includes administration of which of the following drugs?

1. A)Zidovudine
2. B)RibavirinGABARITO
3. C)Ganciclovir
4. D)Acyclovir
5. E)Trifluorothymidine