Which phrase from the first paragraph shows that hamilton thinks the success of the government created by the united states will impact other governments in the future?

C. It seems to have been reserved to the people of this country… to decide the important question, whether societies of men are really capable or not of establishing good government

Explanation:

In this fragment of the text, Hamilton sees Americans as precursors, and the ones that can set a precedent of the establishment of a good government in the world; for Hamilton, if Americans achieve to create a successful government, they will serve as an example for all societies of men. So, with these words, he aims to reflect his view that the success of the government created by the United States will impact other governments in the future.

he is suggesting that this widow is a strong woman, who is giving constructive criticism and she has enough to worry about, and she takes care of him, so he does not take it to heart.