When a law is challenged, a state must justify the law's existence by explaining what public purpose it serves, after which the court will balance this purpose against the right being infringed by the law. What do libertarians say about this? A. The only legitimate public purpose the law serves is preventing us from harming others B. The only legitimate public purpose the law serves is preventing us from harming ourselves C. Preventing harmless immorality is a legitimate public purpose the law serves D. None of the above