Two u. s. senators are guests on a tv news interview program. one is introduced as “senator susan hartford, conservative leader,” and the other is introduced as “senator howard williams, focus of an ongoing corruption investigation.”

these introductions indicate

bias in favor of senator williams
symbolism in favor of senator williams
bias in favor of senator hartford
symbolism in favor of senator hartman

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.