Help please this is hw

After the Spaniards introduced horses to Native Americans the lives of tribes changed. They became less settled and sedentary as the horse allowed them to hunt animals such as bison and buffalo. Instead of staying in one place they became nomadic, otherwise known as nomads, so that they could hunt and keep up with the herds as they moved around.

i think your answer there is c

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.