In argumentative writing, a counterargument introduces an objection to a claim, whereas a rebuttal is the response that addresses and refutes that objection.

### Why this is right The statement is the counterargument because it objects that sample messages are sufficient for a prototype. The rebuttal is the response explaining that samples can help early design, while production systems need broader and more realistic cases. ### The concept A counterargument raises an objection to a claim. A rebuttal responds to that objection. In this example, the distinction also depends on scope: prototype design is not the same as preparing a production system for edge cases, rare failures, and realistic formats. ### The other options - **True**: This is incorrect because the statement presents the objection rather than the answer to it. ### Watch out A statement can be part of an argument without being its rebuttal. Check whether it raises the objection or answers it. ### Remember The prototype statement challenges the claim; the production explanation rebuts that challenge.