Final answer:
The most supportive quote for Marie's argument against school uniforms in her persuasive paper is: "One of the most extreme cases of uniform policy violations occurred at the school in Polk County in 1999."
Step-by-step explanation:
Marie is writing a persuasive paper against school uniforms and seeks evidence to support her position that uniform policies can be detrimental to students and the learning process. Upon examining the given quotes, the best choice to substantiate her argument would be option A: "One of the most extreme cases of uniform policy violations occurred at the school in Polk County in 1999." This quote implies that strict uniform policies can lead to significant issues, thus bolstering her argument that these policies can be harmful. Options B and C are less effective because they don't specifically address the negative impact of school uniforms, while option D contradicts her thesis by stating a potential benefit of school uniforms.