The correct option is option C which tells that using the same currency under Confederation laws not guaranteed.
Explanation- Before the constitution was made there was a loss set of rules that were laid to run the country. These laws allowed the 13 states to work as individual states and there was no one law that could be followed in all the 13 States.
Even with the currency every state had their own set of currencies and the values of these currencies were also different in different states hence we can say under Confederation law same currency was not guaranteed.
