"let us now proceed to enquire, as i at first proposed, whether it be best the thirteen united states should be reduced to one great republic, or not? it is here taken for granted, that all agree in this, that whatever government we adopt, it ought to be a free one; that it should be so framed as to secure the liberty of the citizens of america, and such an one as to admit of a full, fair, and equal representation of the people. the question then will be, whether a government thus constituted, and founded on such principles, is practicable, and can be exercised over the whole united states, reduced into one state?
if respect is to be paid to the opinion of the greatest and wisest men who have ever thought or
wrote on the science of government, we shall be constrained to conclude, that a free republic
cannot succeed over a country of such immense extent, containing such a number of inhabitants,
and these increasing in such rapid progression as that of the whole united states."
- excerpt from "brutus no. 1" written in 1787

which of these would best limit the problems outlined in the excerpt from the "anti-federalist papers" seen here?
a) bill of rights
b) u. s. constitution
c) the separation of powers
d) declaration of independence