Which factor led to the development of the four river-valley civilizations of mesopotamia, egypt, the indus valley, and china? select all correct answers. a. the worship of many nature gods b. the presence of rivers. c. the building of villages and cities. d. a surplus of food. e. the need to unite for protection from enemies.

B.presence of rivers

Explanation:

Because presence of river led to development of agriculture .

the tariff was created to protect industry in the northern part of the united states. industries in the north were being driven out of business by imported goods that were priced at a low rate. the goal was to protect these industries   by taxing the goods.

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.