What was the major message of the monroe doctrine?
a.
all trade between europe and asia had to pass through the americas.
b.
spain and great britain had to completely withdraw from north america.
c.
the american continents were closed to european colonization.
d.
americans could no longer move westward.

Ahistorian has discovered a letter written by an early roman emperor. she translates the letter and discovers that it contains orders to a general before a battle. she works to determine when the letter was written to figure out which battle the letter references.the historian in the passage is most clearly demonstrating which historical thinking skill? a. identifying causes and historical contextb. thinking chronologicallyc. making and evaluating arguments and interpretationsd. analyzing historical sources