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

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.

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.

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.

Drug targets viral processes or structures with minimal harm to host cells.