What statement best explains the creation of railroad lines during the late 1800s

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.

From 1990 to 2008, by what percent did the world’s most developed economies cut their greenhouse gas emissions?

How was george washington able to defeat the british in the battle of trenton and princeton