By about 1700 b. c.e., the residents of harappa and mohenjo-daro began to abandon their cities because
a) frequent epidemics made city living impossible.
b) deforestation of the indus river valley brought about ecological degradation.
c) the horse-riding aryans began to invade the cities.
d) the indus river dried up.
e) all these answers are correct.

How were slavery and indentured labor in american colonies similar

What industry was exempt from the child-labor laws passed in the factory act of 1833?

Two of these describe "federalism." (choose two answers) select one or more: a. the national government absolutely controls all state governments. b. power is shared by the national and state governments. c. state governments exercise absolute power over the national government. d. it is a compromise meant to eliminate the disadvantages of a "unitary" and a "confederate" system.