How did the arrival of railroads impact the indian territory’s economy?
a. fewer job opportunities were available to non-american indians.
b. the oil and mining industries transported more goods and grew greatly.
c. american indian tribes were able to maintain their traditional economies.
d. land was closed to white settlement, removing opportunities in the territory.

D. American settlers were moving natives to reserves to make space for building railroads.

D. Land was closed to white settlement, removing opportunities in the territory.

Explanation:

As a result of the occupation of the western territories, modernization of transport systems took place. Railways and steam navigation were introduced, which facilitated the movement of people and goods. However, the arrival of the railroads had a negative impact on the life and economy of the Indians.

With the arrival of the railroads, the indigenous populations were being fought, pushed out of their lands and exterminated so that there was enough territory for the construction of the railways.

according to the quotation from booker t. washington's 1895 atlanta compromise speech.

in the great leap from slavery to freedom . . the masses of us are to live by the production of our hands . . we shall prosper . . as we learn to dignify and glorify common labor.

washington believed that  hard work had its own kind of dignity.

explanation:

mark brainliest and have a great day!