The Mayas used symbols and pictures to record ideas. They carved these symbols into stones and wrote them in books made with paper. What is one result of the Maya's advanced writing system?
A.
The emperors could change public opinion.
B.
The Maya left behind artifacts from the time period.
C.
Students had to spend many years in school.
D.
The Maya controlled explorers from distant lands.

Which reason best explains why certain areas of southwest asia have low population density? a. the semi-arid climate makes farming difficult because it produces very little rainfall.b. the moist climate limits job opportunities because it reduces oil production.c. the semi-arid climate produces heavy rainfall that contributes to devastating floods. d. the moist climate reduces agricultural production by causing water shortages.