Which of these factors led to the fall of the kingdoms of mali and songhai?
a. regional trade
b. internal conflict
c. caste system
d. natural disaster

internal conflict

Explanation:

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

i belive the continental association was created to boycott all contact with british goods.

i also belive it was in december 1, 1774