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　　4. Which of the following can be inferred from the passage concerning Spanish tribute records?

　　(A) They mention only epidemics of smallpox.

　　(B) They were instituted in 1492.

　　(C) They were being kept prior to the seventeenth century.

　　(D) They provide quantitative and qualitative evidence about Native American populations.

　　(E) They prove that certain diseases were unknown in the pre-Columbian New World.

　　5. The author implies which of the following about measles?

　　(A) It is not usually a fatal disease.

　　(B) It ceased to be a problem by the seventeenth century.

　　(C) It is the disease most commonly involved in virgin- soil epidemics.
　(D) It was not a significant problem in Spanish colonies.

　　(E) It affects only those who are immunologically defenseless against it.

　　6. Which of the following can be inferred from the passage about the Native American inhabitants of Ungava Bay?

　　(A) They were almost all killed by the 1952 epidemic.

　　(B) They were immunologically defenseless against measles.

　　(C) They were the last native people to be struck by a virgin- soil epidemic.

　　(D) They did not come into frequent contact with white Americans until the twentieth century.

　　(E) They had been inoculated against measles.

　　7. The author mentions the 1952 measles outbreak most probably in order to

　　(A) demonstrate the impact of modern medicine on epidemic disease

　　(B) corroborate the documentary evidence of epidemic disease in colonial America

　　(C) refute allegations of unreliability made against the historical record of colonial America

　　(D) advocate new research into the continuing problem of epidemic disease

　　(E) challenge assumptions about how the statistical evidence of epidemics should be interpreted

　　8. Which of the following, if newly discovered, would most seriously weaken the author's argument concerning the importance of virgin-soil epidemics in the depopulation of Native Americans?

　　(A) Evidence setting the pre-Columbian population of the New World at only 80 million

　　(B) Spanish tribute records showing periodic population fluctuations

　　(C) Documents detailing sophisticated Native American medical procedures

　　(D) Fossils indicating Native American cortact with smallpox prior to 1492

　　(E) Remains of French settlements dating back to the sixteenth century