Just after the one month, Lincoln came to the office of the President of the United States, he was facing the problem of secession, which would divide the country. While the Confederacy claimed that secession is their constitutional right, Lincoln refute these claims. He said that it is a fight for democracy and U.S is the only country in the world which profess democracy and any threat to its unity would be seen as a threat to the institution of democracy in the world.
He feared all the options mentioned above except 'b) inhabit industrial development'.