Answer:
Option A, People from different ethnicities and backgrounds worked together and developed good relations
Step-by-step explanation:
During the westward expansion in 19th century, the Native Americans tried to expand their foots in the lands of Native Americans. The white Americans were attracted towards the western land because of its land and gold.
Some of the positive impacts are as follows –
a) Immigrants gained better life and opportunities as immigrants learned to grew large crops and earned profits
b) Economic growth happened as farming, industrial, and manufacturing sectors intensified
c) Government policies were favourable such as financing agricultural education, The Homestead Act etc
Hence, option A is correct