How did Sumerians use the resources in their climate when building their cities?
A. Due to the environment, early Sumerians built cities that were isolated
from each other.
B. They built tall ziggurats to keep people off the scorching ground and away
from mudflats.
C. They combined reeds and mud to form bricks for building homes and
city walls.
D. Most middle-class Sumerians farmed land on the city-state perimeter.
