Why is the inset map of north america included?

Why might the spanish government have approved of the encomienda system? a the system allowed for fair treatment of all under it, leading to a happy and prosperous colony. b the system used natives as slaves which meant the government was able to maximize their profit of exported goods. c the system allowed for mostly profitable trade within the different colonies. d the system was a great example of how to successfully run a colony, making spain a world power.

According to some historians which marks at the beginning of the us civil war

Sea level increases when the number and size of glaciers on earth increase. true false