The answer is B.
The Articles of Confederation was extremely weak due to its lack of federal power, it gave most of the authority to the states. This is discussed in the passage as it talks about how the federal/national government had no authority to raise money, etc. Thus, the answer is B, as the answer says the national government had a lack of authority to control the debt crisis.
The Tang dynasty fostered the most advanced trade network of the four.
Initially the movement operated chiefly at the local level but it later expanded to the state and national levels progressives drew support from the middle class and the supporters included many lawyers teachers physicians and ministers and business people
Government actions intended to provide a basic level of assistance with income, safety, education, housing, and health care for certain categories of people at risk.