What were two effects of the invention of the compass on China during the Middle Ages?

It enabled the chinese people to navigate the seas and participate in sea trades.

Explanation:

It insipired china to expand It's army and conquer more territory

The first compass was used not to point people in the right direction literally, but figuratively.

CompassKnowing what direction you are facing is a very valuable piece of information. 2.This is especially true if you are traveling: because you can use the information to help find your way or guide your safe return. There’s nothing much worse than getting hopelessly lost in the woods or successfully exploring a new frontier, only to find that you have no idea how to make it back home.

Explanation:

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all of the choices are correct

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.