I'll need a little bit more information than that, however the answer that best suits the question is: White male settlers. They were payed to settle the west.<span />
The cause would be rodents carrying the disease and the fleas would bite the human
The first question is C.
The second question is A.
The third question is D.
The fourth question is B.
It would be D due to the fact that this was to make it harder for immigrants to vote.
