<span> regulate commerce in both the North and the South, but could not yet regulate the slave trade.</span>
The Romans were notoriously known for building massive roads from place to place, effectively uniting the empire's cities and trade routes. One such example of this is the Silk Road. A road that spanned across the Roman Empire all the way east to Asia.
I think it may be 2 because they did want to be their own country so I think that’s y they moved over to the US