Which of the following best defines selective toxicity for antiviral drugs?

• A. A drug that blocks host immune responses so the virus cannot exploit inflammation, thereby reducing symptoms regardless of direct antiviral activity against viral proteins or genomes.
• B. Using a drug that indiscriminately kills any microorganism present, including host cells, in order to eliminate infection rapidly and reduce transmission at the cost of significant host tissue damage.
• C. Administering high doses of antibiotics together with antivirals to ensure that bacteria and viruses are both eliminated simultaneously, thereby preventing co-infections that could complicate recovery.
• D. Drug targets viral processes or structures with minimal harm to host cells.

Answer: (D)