Answer:
B when south Carolina fired on Fort sumter
No he for it but he didn’t want to
The Twelfth Amendment (Amendment XII) to the United States Constitution provides the procedure for electing the President and Vice President. It replaced the procedure provided in Article II, Section 1, Clause 3, by which the Electoral College originally functioned. The amendment was proposed by the Congress on December 9, 1803, and was ratified by the requisite three-fourths of state legislatures on June 15, 1804. The new rules took effect for the 1804 presidential election and have governed all subsequent presidential elections
I believe it was the tenth amendment Amendment X (or 10) Rights Reserved to States or People. Passed by Congress September 25, 1789. Ratified December 15, 1791. ... The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people
Yes, He was restricted by convection in many ways, I'm not sure completely, maybe someone else can answer