C. increased Soviet assistance and the formation of communist governments in several Arab territories
The Romans used the Arch and Dome for buildings mostly, for example the aqueducts.
You would be mostlikely to find a high population density "along the banks of
<span>the Niger River," since rivers bring water, which is a crucial element of human survival. </span>
Europe would be in contact with lost knowledge sooner that in reality happened. As the arab nations were more civilized than some others, the cities were preserved and the really important work of the romans would be preserved and enhanced. The gods statues were destroyed and Islam would be the only religion.
