The Civil War harmed ranching in the Indian Territory by . A.
encouraging conflicts between tribes
B.
introducing Texas fever to tribal herds
C.
allowing tribes to lease land to ranchers
D.
creating large cattle trails

I believe the answer is gonna be A. Encourage conflicts between tribes.

Explanation:

Some Indian tribes, like the Cherokee took the confederate's side later in the war, where as the Creek Indians fought for the Union.

Hope this helped. Sorry if it didn't.

The answer is A.Tribes cooperated with each other more because of the war.

Explanation:

I just took the test with 10 min to spare