A patient takes two medications. Drug A is taken once per day; drug B is taken every 8 hours. Which conclusion about drug A is correct?

Choice A rationale: The frequency of drug administration doesn’t necessarily determine the therapeutic range. Choice B rationale: Protein binding is not directly related to the frequency of drug administration. Choice C rationale: Drug A has a longer half-life than drug B. This is because drugs with longer half-lives need to be administered less frequently. Choice D rationale: The toxicity of a drug is not determined by the frequency of its administration.