Question

Which best describes a development that improved railroad safety?

Railroads adopted standard time to coordinate schedules.
Railroads offered fold-down beds so that people could sleep more comfortably.
Companies standardized track technology so that they could use each other’s tracks.
Companies replaced hand-operated brakes with air brakes on trains.

Answer 1

Companies replaced hand-operated brakes with air brakes on trains.

Step-by-step explanation:

Edge 2020.

Answer 2

The answer should be: Companies replaced hand-operated brakes with air brakes on trains.

Step-by-step explanation:

You have to think how hard it was for trains to stop with hand operated brakes. Trains go fast, and not stopping in time can be dangerous. Hope this helped :)