Which was a characteristic of the cities of the Indus River valley? A. Emphasis on tribute to the gods
B. Emphasis on defense
C. Emphasis on artistic expression
D. Emphasis on sanitation

because their parents smoke while in labor

c. the passage of the fifteenth amendment

a causal relation between two events exists if the occurrence of the first causes the other. the first event is called the cause and the second event is called the effect. a correlation between two variables does not imply causation.

explanation:

immigrants from northern and western europe continued coming as they had for three centuries, but in decreasing numbers