By working together voluntarily, the railroad companies were able to standardize their timetables in 1883. The correct option among all the options that are given in the question is the second option. The creation of time tables made the railway system more efficient and people could know the exact time at which their goods or the people travelling will reach their destination.
The answer to the question is 1889 however it did not go smoothly
The river Nile left behind rich soil when it flooded. So the correct option for the given question is option "B". The river Nile brought with it very rich soil from other places and deposited them in the flood plains. when the flood water receded, the farmers were able to cultivate the land and get a rich vein of crops for feeding all the people making up the civilization near the river banks of Nile. Every year, with new flooding of the plains, new rich soil is brought abd deposited. The farmers are able to reap great crops in the flood plains of the river Nile every year due to this reason.
