What two things end cattle drives in texas? a. new businesses and the cotton gin b. barbed wire and railroads c. the dust bowl and the great depression d. automobiles and trains

Why did president lincoln place general mclellan under the command of general halleck? a. mcclellan failed to capture richmond. b. mcclellan was responsible for the north's defeat at the second battle of bull run. c. mcclellan failed to defeat lee at antietam creek.

2. what was the dred scott decision about? what do we learn from this supreme court case?

How did modern american history begin with “contact”?