President james k. polk campaigned on a platform of westward expansion.

to what extent did he live up to that promise during his presidency?

the united states grew by about a third.

the united states lost territory.

the united states added a small amount of territory.

the united states remained about the same.

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.