The answer is C, preserving the Union. Lincoln famously said, "If I could preserve the Union without freeing a single slave, I would."
Horace Mann was a key figure in ensuring all American children received a proper education.
Lester Frank Ward, an American sociologist, botanist and
paleontologist believed that one of the government’s primary roles was to
protect the citizens from robber barons by regulating these big businesses. He
talked about it in his published 2 volume work Dynamic Sociology.
Correct, with the federalist papers, James Madison helped him.<span />