Final answer:
Madison's next task is to help the audience care about the problem by supporting her viewpoint with evidence and reasoning, as well as understanding counterclaims. The correct answer is option D.
Step-by-step explanation:
After Madison has finished brainstorming the problem for her proposal argument, her next task is most likely to help the audience care about the problem she has identified. This involves presenting a clear and definite viewpoint and explaining why the audience should consider the issue important. Madison would need to support her viewpoint with reasoning and evidence, as well as demonstrating an understanding of counterclaims to bolster the credibility of her argument. To further develop her proposal, Madison could also consider looking for evidence, talk with others to discover potential counterarguments, and even adopt an opposing stance to better understand and refute counterclaims.