Answer:
Regulate commerce in both the North and the South, but could not yet regulate the slave trade.
Explanation:
The constitutional convention was made to write a new constitution for the USA, in that convention were solved many problems, among these problems, the guidelines between commerce and the slave trade were resolved. In this regard it was decided that the Congress could not prevent the slave trade, but a tax would be levied on each imported slave.
The Warsaw Pact sought to reinforce communist dominance in Eastern Europe. The Soviet Union formed this alliance as a counterbalance to the North Atlantic Treaty Organization (NATO)
The correct answer is A. Technological advances such as s<em>team power, air brakes, automatica lubricators and steel tracks</em> have affected the railroads very positively, since it has made it possible that the rail network could become a safer, more efficient and more reliable means of transportation for goods.
I believe the answer would be a monarchy.
The battle stopped the Germans from advancing further east.