How did the native cultures affect the politics of this region?
a. they demanded that american settlers return their lands.
b. they mexican soldiers find routes into texas.
c. they prevented american settlers from moving to texas.
d. they weakened mexico's hold on texas and other territories.

A.) th ey demanded that american settlers return their lands. 

Opposition to the nra came to a head in 1935, when the conservative supreme court declared the agency unconstitutional, claiming the nra gave the executive branch regulatory powers that belonged exclusively to congress. this decision began a series of court decisions that overturned key elements of the new deal.