Can someone help? ( NOL LINKS!) 1. In the Spanish empire controlled social structure, which of the following were at the top of the system? *
A. American Indians
B. creoles
C. mulattoes
D. peninsularies

2. Why has the Colorado River become an environmental issue? *
A. Frequent flooding threatens endangered habitats in the Rocky Mountains.
B. Oil spills have polluted the river and threatened many species.
C. Irrigation has severely reduced the flow of water.
D. River levels are rising rapidly as a result of climate change.

3. When the people of Middle America realized they could grow crops for a more reliable food supply, what resulted? *
A. They could settle down into villages.
B. The plants gathered were destroyed in a natural disaster.
C. The animals they hunted completed died out.
D. Their transportation method was eliminated.