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:
Jim Crow laws were state and local statutes that legalized racial segregation
Explanation:
It was supposed to discriminate against Blacks and not allow them to do things that citizens would do.
Answer:
<h2>The human figure is a common aspect in visual arts. Very few art forms are not related to human figure such as music, though it figures in lyrics. A study of the human figure includes a detailed study </h2>
Explanation:
Congress enacted the FLSA to eliminate “labor standards detrimental to the maintenance of the minimum standard of living necessary for health, efficiency, and general well-being of workers,” and to prevent these substandard labor conditions from being used as an “unfair method of competition” against reputable
