Which answer best describes how the powers granted to Congress by the Articles of Confederation helped unite the states into one nation? Congress let the states decide the best way to expand the western territory and then let them agree on how to divide and govern it. Congress made laws to expand the western territory and then passed laws to decide how to divide and govern it. Congress declared war against the Native Americans to expand the western territory and then passed laws to decide how to divide and govern it. Congress let the states decide whether to enter the war against the Native Americans and then let them agree on how to divide and govern the western territory.