Which of the following statements about post-agricultural Middle East and South America is true?
a. The Middle East immediately created centralized political systems, while South American cultures remained a loose array of competing city-states until the arrival of the Spanish.
b. Trade was unimportant in the Middle East, but an important factor in the economic success of South American elites.
c. Pottery styles remained simple and functional in both locations.
d. People in both areas built monumental architecture for numerous reasons.