What does an empirical analysis of the key votes at the Constitutional Convention suggest?

(a) Merchants, manufacturers, capitalists, creditors, and public and private security holders supported a national system of government.
(b) Delegates from larger and coastal states, as well as bankers and other private debt holders, were most likely to support the new Constitution.
(c) Slaveholders were likely to stand in opposition to the Constitution, while farmers and debtors were either opposed or indifferent.
(d) All of the above are correct.

(d)