Why did settlers in the Northwest choose not to settle in the Great Plains?

(1 point)
Responses

The Plains Indians would not allow it.
The Plains Indians would not allow it.

The trees on the Plains made farming difficult.
The trees on the Plains made farming difficult.

They did not think the land of the Plains was fertile.
They did not think the land of the Plains was fertile.

Travel across the Plains was difficult.

Travel across the Plains was difficult.