TIMES PLEASE HURRY. The map shows railroads of the North and South in 1850 and 1861. A map showing the railroads of the North and South in 1850 and 1861 in the U S.
Which of these was NOT an effect of the growth of the railroad system?

Trade increased between the North and the South.
Western railway hubs became the center of the system.
The South remained tied to agriculture.
Cities and towns with railways grew in population and wealth.

because the vietnam war was fought in an especially brutal and untraditional way

in the 1800s, chinese workers migrated to the united states, first to work in the gold mines, but also to take agricultural jobs, and factory work, especially in the garment industry. chinese immigrants were particularly instrumental in building railroads in the american west, and as chinese laborers grew successful in the united states, a number of them became entrepreneurs in their own right. as the numbers of chinese laborers increased, so did the strength of anti-chinese sentiment among other workers in the american economy. this finally resulted in legislation that aimed to limit future immigration of chinese workers to the united states, and threatened to sour diplomatic relations between the united states and china.

i believe out of the choices it is a.