The best and most correct answer among the choices provided by your question is the second choice which is "railroad tracks."
<span>By 1860 the Midwest and the East were united by a network of railroad tracks.</span>
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
What is now known as Germany or the Germanic Region
The Arab traders who traded in Africa were responsible for bring Islam to Africa
Lee wanted them to dig trenches before Burnside’s army arrived.
Ottoman Empire represents on of the largest imperial projects in the history of humans, ruling vast territories in North Africa, the Balkans, and the middle east over a period of some five centuries. It was created by Turkish tribes in Anatolia that became one of the most powerful states in the world during 15th and 16th centuries. The central fact that allowed Suleiman to peruse urban renewal projects was the fact that his revenues from the state were higher than those of other European monarchs.
