Problem: Society throughout Europe was disturbed by the dislocations caused by the Black Death. Lands that had been marginally productive were abandoned, as the survivors were able to acquire more fertile areas. Although serfdom declined in Western Europe it became more common in Eastern Europe, as landlords imposed it on those of their tenants who had previously been free. Most peasants in Western Europe managed to change the work they had previously owed to their landlords into cash rents. The percentage of serfs amongst the peasantry declined from a high of 90 to closer to 50 per cent by the end of the period. Landlords also became more conscious of common interests with other landholders, and they joined together to extort privileges from their governments. Partly at the urging of landlords, governments attempted to legislate a return to the economic conditions that existed before the Black Death. Non-clergy became increasingly literate, and urban populations began to imitate the nobility's interest in chivalry.
At serfdom's greatest extent, what percentage of Western Europeans were serfs?
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Answer: 90

Problem: Florida is among the three states with the most severe felony disenfranchisement laws. Florida requires felons to have completed sentencing, parole and/or probation, and then seven years later, to apply individually for restoration of voting privileges. As in other aspects of the criminal justice system, this law has disproportionate effects for minorities. As a result, according to Brent Staples, based on data from The Sentencing Project, the effect of Florida's law is such that in 2014 "[m]ore than one in ten Floridians and nearly one in four African-American Floridians are shut out of the polls because of felony convictions."
How severe are Florida disenfranchisement laws
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Answer: Florida is among the three states with the most severe felony disenfranchisement laws.

Problem: Reptiles such as adders and vipers live up to the snow line; because they cannot bear the cold temperatures they hibernate underground and soak up the warmth on rocky ledges. The high-altitude Alpine salamanders have adapted to living above the snow line by giving birth to fully developed young rather than laying eggs. Brown trout can be found in the streams up to the snow line. Molluscs such as the wood snail live up the snow line. Popularly gathered as food, the snails are now protected.
Why do reptiles only live up to the snow line?
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Answer:
they cannot bear the cold temperatures