• Invention of the cotton gin • Opening of lands along the Mississippi River
•Growing demand for inexpensive labor
Which change occurred as a direct result of these developments?
A. A reduction in the number of skilled workers in northern states
B. The expansion of manufacturing into the western territories
C. A reduction in trade with European countries
D. The expansion of slavery into newly acquired territories

D. The expansion of slavery into newly acquired territories.

Explanation:

study of past cultures

the committees of correspondence were the american colonies’ means for maintaining communication lines in the years before the revolutionary war. in 1764, boston formed the earliest committee of correspondence to encourage opposition to britain’s stiffening of customs enforcement and prohibition of american paper money. the following year, new york formed a similar committee to keep the other colonies notified of its actions in resisting the stamp act. in 1773, the virginia house of burgesses proposed that each colonial legislature appoint a committee for intercolonial correspondence. the exchanges that followed built solidarity during the turbulent times and bring about the formation of the first continental congress in 1774.