1. Protest that turned into armed conflict
Answer:
It improved communication a lot not and enabled people to save money on transportation (its easier to call someone than write a letter and make someone on a horse ride for miles) not sure about the effects on power though.
Explanation:
The correct answer is option D. "Companies replaced hand-operated brakes with air brakes on trains". The development of air brakes on trains was a significant improvement of railroad safety. Air brakes function much more faster than hand-operated brakes, because hand-operated brakes required that the brakemen turned the brakes in one car and jump to the next to set the brakes on, and so on.
The battle of Appomattox court house fought on the morning of April 9, 1865, was one of the last battles of the American civil war. hoped this helped!!!:-)
