Sara: Anthropologists estimate that diseases brought to the Western Hemisphere by the first Europeans, including smallpox, hepatitis, typhus, and measles, killed 95 percent of the Native American population and allowed Europeans to begin their conquest of the continent. If the Native American population had been twenty times greater, only 4.75 percent of the population would have died, and the Europeans would never have been able to conquer North and South America.
Michele: Those death rates are way too high. The average rate of death in Europe from the most virulent epidemic in recorded history, the Black Death of the 14th century, was only 33 percent. Even if the Native American populations were extremely vulnerable due to their never having been exposed to these diseases, the cumulative death rate of all of the diseases should not have been more than 50 to 75 percent on average.
Which of the following, if true, would most weaken Michele’s conclusion?
(A) Native Americans generally lacked the enzyme that would allow them to digest the sugars in milk.
(B) Knowledge of medicine in Native America was much more advanced than in Europe at the time of Columbus.
(C) At the time of Columbus, Native Americans were much less genetically diverse than Europeans, so there were fewer possibilities of natural immunity.
(D) The death rates from the Black Death were higher than 33 percent in specific locations.
(E) Diseases that quickly kill more than 75 percent of their infected hosts usually die off with their host’s extinction.