The Anti-Federalists’ main objection to ratifying the Constitution was that it had no bill of rights.
did not have a judiciary.
had no provision for a militia.
did not divide the central government.

(A had no bill of rights. )

Explanation:

The Anti-Federalist main reason for opposition of the Constitution was it had no bill of right's or protection of individual rights like the Original Articles of Confederation Had, the Bill of Right's was eventually added to the Constitution in the form of the First 10 Amendments in 1791.