The phrase from the text that best presents ethos is: "No city or State or legislative body can prudently choose to ignore them."
This particular statement appeals to ethos by invoking a sense of responsibility and prudence that should guide the actions of cities, states, and legislative bodies. It suggests a moral obligation to address the issues at hand, emphasizing the importance of acknowledging and responding to the cries for equality. The use of the term "prudently" adds a dimension of wisdom and careful consideration, reinforcing the idea that ignoring the issues would be an imprudent and morally questionable course of action.
The chosen phrase establishes credibility and moral authority by asserting that responsible entities cannot reasonably ignore the pressing matters of equality and justice. The ethos appeal is based on the implicit trust in the speaker's judgment and the shared values of prudence and responsibility in addressing social issues.
Therefore, "No city or State or legislative body can prudently choose to ignore them" presents ethos best.