What the answer? Ty!!

Which controversial political issue of the 1920 is reflected in the cartoon

When the ottoman empire weakened, europe reacted by building a canal for trade with the ottoman region. ottoman nations achieve independence. cutting off most trade with the ottoman region. trying to take more control of ottoman lands.

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.