Review the graph.
 A line graph titled The Population of Europe. The x-axis is labeled Years (1300 to 1800). The y-axis is labeled Population Estimate (in Millions). Estimate 1: 1300, 80 million; 1400, 50 million; 1500, 60 million. Estimate 2: 1300, 100 million, 1400, 60 million; 1500, 63 million; 1600, 75 million, 1700, 85 million; 1800, over 120 million.
 According to both estimates, how long did it take Europe’s population to begin to rebuild after the plague?
 at least one hundred years
 less than one hundred years
 more than three hundred years
 more than five hundred years