The historical impact of the Nineteenth Amendment is best summarized by its role in granting women the right to vote, thereby expanding suffrage. However, none of the responses directly reflect that specific impact. The most relevant answer among the options provided would be the expansion of suffrage to Black men, even though this is not directly related to the Nineteenth Amendment itself. The Nineteenth Amendment primarily focused on women's suffrage.
If you need to choose one from the options provided, it would be best to clarify that while the Nineteenth Amendment expanded suffrage to women, the other options pertain to different aspects of voting rights and reforms.