Which of the following statments describe a problem with the articles of confederation

Here is a list of problems that took place under the Articles of Confederation:

1) No common currency - Each state had different currency (aka money) making international and interstate trade extremely difficult.

2) Inability to collect taxes - This resulted in the federal government being unable to pay off their debt from the American Revolution.

3) Weak federal government - The federal government could not follow states to follow federal laws.

4) Inability to stop rebellion - The Articles of Confederation made it so that the federal government had so little power that they could not put down rebellions within the US (example = Shay's Rebellion).

confederation is something very important that, young ones dont know the answer to