Why did so little people settle west of the mississippi river between 1700 and 1800

The land west of Mississippi during the 1700's and most of the 1800' was land that was still dominated by the Native American tribes and the Spanish, and it was not safe at all for people to move in those parts considering the very bad relations with the native populations in that time of period. Also, the authorities, still hadn't tried to motivate people and try to make them settle in those areas with some measure that was going to be attractive for them.

b. would be the answer if not try c

hope this correct me if my answer is wrong if i am correct can you plz give me brainliest

: ) : 0 : o : d

explanation:

the correct answer is batering