Answer:
D. At railroad junctions
Step-by-step explanation:
Rail road Junctions provide a lot of opportunities for new cities to be able to thrive rapidly.
Railroad Junctions typically passed by a lot of people. if new businesses were established within these junctions, it will obtain a lot of potential buyers from the sheer amount of people that pass through the area. On top of that, Rail Road Junctions enable new cities to distribute their goods into several different regions on relatively low cost.
The combination of these factors were why most cities and towns in Texas built in Railroad Junctions in early 1900s