What is true about antiretroviral drugs used to treat human immunodeficiency virus (HIV)?
Correct Answer: C
Rationale: The correct answer is that antiretroviral drugs inhibit viral replication. These medications work by interfering with the ability of the HIV virus to multiply in the body, helping to control the infection. Choice A is incorrect because consistency in taking antiretroviral drugs is crucial to their effectiveness. Missing doses can lead to treatment failure and the development of drug-resistant strains of HIV. Choice B is incorrect as there are multiple licensed drugs that are effective in treating HIV. Choice D is also incorrect as antiretroviral drugs do not kill the virus but rather suppress its replication.