Which strategy is the most effective way for the author of a persuasive text to refute an opposing viewpoint?

telling readers that the opposing viewpoint simply has no support
telling readers that the opposing viewpoint simply has no support

restating the original argument in even stronger terms
restating the original argument in even stronger terms

providing statistics that contradict the opposing viewpoint
providing statistics that contradict the opposing viewpoint

pointing out that the opposing viewpoint is biased

pointing out that the opposing viewpoint is biased