College Composition CLEP Prep Practice Test - Complete Study Guide

A counterargument is a statement or point made in an essay that challenges the main argument or thesis. Its purpose is to address potential weaknesses or opposing viewpoints in order to strengthen the overall argument. This option may be incorrect because introducing a supporting argument is usually done earlier in the essay, while a counterargument is typically presented towards the end as a rebuttal.

B is incorrect because while a counterargument does add complexity to the discussion, that is not its main purpose. The main purpose is to address any potential flaws in the argument.

D is incorrect because restating the main point does not address any potential opposing viewpoints or strengthen the argument.