Which best describes a development that improved railroad safety? a. railroads adopted standard time to coordinate schedules. b. railroads offered fold-down beds so that people could sleep more comfortably. c. companies standardized track technology so that they could use each other’s tracks. d. companies replaced hand-operated brakes with air brakes on trains.

Correct answer choice is :

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

Explanation:

There is a demand among railway track sustaining programmers for a better knowledge of the long-term performance of railway track operations and for advanced auspicious methods. The use of correct methods to predict railway track situations improves track protection and support effectiveness. The purpose of this analysis is to enhance current track decline modeling methods using a thorough track inquiry.

the process is called revolution because it was a process of great economic-social transformations that began in england in the xviii century.

the industrial mode of production spread throughout much of the northern hemisphere throughout the xix and early xx centuries.

the effect of this revolution was the distance between the countries, with respect to economic and political power.   after all, not all industrialized at the same time, remaining in the condition of suppliers of raw materials and agricultural products to the industrialized countries.

these differences mark to this day the nations of the world that are divided between developed and developing countries. one way to measure whether a country is advanced is to assess how industrialized it is.

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.