Which of the following was a consequence of westward expansion that affected american indians in the mid-1800s?
desert sands became difficult to cross.
wagon trains scared away wild game.
rainstorms turned trails into mud.
the pace of travel became extremely slow.

Wagon trains scared away wild game would be the best answer.  Prior to the westward expansion, Native Americans roamed and hunted on these parts but when more and more settlers came in, they were now occupying land where the animals use to stay or worse land that the Natives considered their territory and eventually there would be conflict between the two groups.

Wagon trains scared away wild game.

letter d is correct.

i would say that the politicial parties from state to state varies.