To many voters in 1980, ronald reagan, in contrast to jimmy carter, seemed:
a. indecisive.
b. capable of getting congress to pass a liberal reform program.
c. humorless.
d. to be a deep thinker and expert on the details of policy.
e. upbeat

Which of these would be most useful in studying the effect of germs exchanged between the new and old worlds? a. a graph showing the number of europeans between 1492 and 1600. b. a graph showing the number of native americans between 1492 and 1600. c. a primary source description of the symptoms of an unknown disease affecting native americans in 1492. o d. a primary source description of the symptoms of an unknown disease affecting europeans in 1492.