The Song political system a. dissolved its entire military structure to save money for trading activities. b. was run by a female emperor during the late Yuan dynasty. c. developed the equivalent of a modern cabinet within its Department of State Affairs. d. restored Legalism as its supporting official philosophy. e. was able to solve the problem of nomadic invasions by using its new fire-lance to exterminate nomadic cavalry.

Was able to solve the problem of nomadic invasion by using its new fire Lance to exterminate nomadic calvary

Explanation:

Production of gunpowder to help the military

in the 1800s, locomotives powered by steam made transportation faster and cheaper. the resulting rapid growth of railroads led to the connection of the atlantic and pacific railroad in oklahoma city in 1897.

in the last years of the century, the improvement of steam-based engines the expansion and growth of railroads. this growth increased when the companies started to build and expand, such as the atlantic and pacific railroad, which connected new mexico with california, and missouri with oklahoma. many of these new networks were built in oklahoma, and these changes transportation henceforward.