What key advances in knowledge and technology allowed europeans to explore these new areas?

1920's

╾━╤デ╦︻

explanation:

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.