What was the clear sign that the article of confederation didn’t work

"The weaknesses of the Articles of Confederation would quickly lead to problems that the Founding Fathers realized would not be fixable under the current form of government. Many of these issues were brought up during the Annapolis convention of 1786. These included the following: 

the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.