The transcontinental railroad runs from the to the i. north ii. south iii. east iv. west a. i and ii b. ii and iii. c. iii and iv d. ii and iv

C. III and IV

Explanation:

With the construction of the First Transcontinental Railroad, it was possible to connect the coasts of the Pacific Ocean with the Atlantic Ocean, so the railroad traveled from east to west. For the first time in history, a railway network connected two sea coasts and thus the project is still a reference in the field of railway construction.

This is because the construction of the First Transcontinental Railroad was very difficult. Several applications of engineering and work techniques were required for its development, as the railway had to pass through high mountains and various types of plains along the Union Pacific Railroad and Central Pacific Railroad, which gave rise to the eastern and western lines.

native american contribution: the patriots from britain learn how to hunt, fish, and introduce diversity within cultures.

african americans: indirectly introduced the idea of diversity to americans. africans coming to america because of slavery taught white americans that people come from different backgrounds and colors. it also built america's economic stability for a great period of time. 

women: make america what it is today. there are some societies that are in the world currently that do not give women the same right we give women here in the united states. because women have rights here in the united states, other countries' citizens strive to come to america, especially women, since they have equal rights in the united states. this is important because america is seen and desired by many in the world. 

children: children are our future. we learn from our elders and carry out things the same or differently learning from america's history. we continue tradition and change tradition if it is needed.