Final answer:
Both the Articles of Confederation and the Constitution could be amended; however, only the Constitution established three distinct branches of government, provided for a strong central government, and did not give the President the power to declare war.
Step-by-step explanation:
Both the Articles of Confederation and the Constitution had processes for amendments, but they differed significantly in their foundational structures. The Articles of Confederation created a one-house congress without a separate executive branch or national judiciary, and it could not regulate trade, tax the states, or enforce its laws without a national judiciary. In contrast, the 1787 Constitution established a stronger central government with the ability to tax, regulate interstate commerce, and enforce laws.
Therefore, among the presented options, both A. could be amended is accurate. However, only the Constitution B. established three distinct branches of government. Neither AOC nor the Constitution C. gave the President the power to declare war; this power resides with Congress. Lastly, D. provided for a strong central government applies only to the Constitution, as the Articles of Confederation created a weak central government that could not efficiently manage the country's needs and led to its replacement by the Constitution.