The following chart shows the population of Europe from 1750 to 2000. Use the chart to answer the following question:
Look at the data in the chart. What developments in mid-17th century Europe help explain this data? (5 points)
a. Population increased in the mid-17th century because all European nations united under a common empire.
b. Population decreased in the mid-17th century because most political systems were unstable.
c. Population increased in the mid-17th century because there was more religious tolerance after the Thirty Years' War.
d. Population stayed the same in the mid-17th century because immigration and emigration rates were equal.
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