A) lack of a bill of rights CORRECT The Anti-Federalists' most significant objection to the Constitution was the absence of a bill of rights. They believed that without explicit protections, the new federal government would inevitably infringe upon individual liberties such as freedom of speech, religion, and the press. This concern was rooted in their revolutionary experience and fear of centralized authority. The promise to add a bill of rights was crucial in securing ratification, and the first ten amendments were adopted in 1791 to address this demand.
B) presence of an electoral college INCORRECT While some Anti-Federalists criticized the electoral college as an undemocratic mechanism, it was not their primary objection. The electoral college was a compromise between those who wanted Congress to choose the president and those who favored direct popular election. Anti-Federalists were more concerned with the overall concentration of power in the federal government than with this specific feature. The debate over the electoral college was secondary to the bill of rights issue.
C) creation of a bicameral legislature INCORRECT The creation of a bicameral legislature was not a major objection for Anti-Federalists. In fact, many state legislatures were bicameral, and the structure of Congress was seen as a necessary compromise between large and small states. The Great Compromise, which created the House and Senate, was generally accepted. Anti-Federalists focused more on the lack of a bill of rights and the potential for the federal government to overpower the states.
D) weakness of the judicial branch INCORRECT Anti-Federalists did not object to the weakness of the judicial branch; rather, they feared that the federal judiciary would become too powerful and undermine state courts. They were concerned about the lack of jury trials in civil cases and the establishment of lower federal courts. However, these concerns were not as prominent as the demand for a bill of rights. The judicial branch's structure was debated, but it was not the central issue in the ratification fight.