Driving at 55 miles per hour saves gas
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.
Answer:
Thomas Jefferson
Explanation:
He is most responsible for the Declaration of Independace because he is the one who wrote ot.
I’m thinking it caused the French Revolution to become more radical
Answer:
i hhave no words for this question
