Which of the following reasons is the best possible explanation for the changes in europe's population since 1750?
a. an increase in scientific and medical discoveries improved life expediencies.
b. political revolutions caused a shift from absolute to constitutional monarchies.
c. the enlightenment encouraged european peasants to increase their family sizes.
d. the scientific revolution led to a sharp increase in immigration.

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.