In 1954, the American scientist Jonas Salk developed a vaccine for the prevention of
A. typhoid.
B. tuberculosis.
C. polio.
D. yellow fever.
E. influenza.
Answer: C
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Peasant revolts in the period of the Black Death were triggered by __________.
A. attempts to reimpose pre-plague economic conditions B. anger at the disproportionate loss of life among the lower classes C. religious ferment D. the rapid growth of towns
Discuss the factors that led to the Louisiana Purchase. Why was Jefferson reluctant to agree to the purchase? Why did he ultimately agree to it? Why was the purchase significant?
What will be an ideal response?
As president, William McKinley can best be described as
a. cautious and conservative. b. a man of little ability. c. an active reformer. d. a person willing to go against the opinion of the majority. e. a skillful negotiator.
Which two countries were at the forefront of polyphonic song in the Middle Ages?