I am fairly certain that the answer is going to be D. The influx of Europeans drove them from their lands.
The only answer that comes even remotely close to being correct other than D. is going to be C, but most Native Americans did not willingly convert to Christianity.
I hope this helps!
Answer:
Because Females sometimes have less privileges than males because some people believe that women are only good for cleaning and taking care of kids.
The political machines took bribes, controlled contracts, and they embezzled money.
Their organization was very corrupt.