Answer: (B) Articles of Confederation
Explanation: The Articles of Confederation were the first attempt at a constitution for the United States. However, they had notable weaknesses, such as a lack of a strong central authority and the inability to levy taxes, leading to an ineffective government.
Incorrect Choice (A) - Magna Carta: The Magna Carta is an English historical document that influenced the development of constitutional principles but is not relevant to the perceived weaknesses of the American government. It was drafted in 1215 and focused on limiting the power of the monarchy.