The answer is letter** D.)** when the counterargument has a relevant.
Concede by definition means to agree or to allow. To concede a counterargument or a rebuttal happens when D. when the counterargument has a relevant point. When this happens, the argument is true and presents a fact.
You should concede to a counterargument when it presents a relevant point that enhances the discussion. This not only shows openness to other perspectives but also can strengthen your own argument by addressing complexities. Overall, conceding does not imply complete agreement but rather an acknowledgment of partial validity in the opposing view.
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