Although trains were invented long ago, what kept them from being really efficient?

a-they were too cumbersome.
they ran on wooden wheels.
they could not go uphill.
their tracks were too brittle.

Their tracks were too brittle.

Early train tracks were initially made from iron. Iron is brittle and prone to cracking when trains ran over them repeatedly.

The process of converting iron to steel in an cheap and efficient way changed the quality of railroad rails. Once rails were creating through the Bessemer process and manufactured by Carnegie Steel, the rails help up longer. This also meant trains could be used more effectively and rails could be place all over the country increasing transportation.

they spoke with the president

explanation:

b.

explanation:

he is racist

"oh, lets coppy china and build a great wall around bla bla bla.that way,we wont lose out to other countries." in the end, he did not build anything