A challenge that Mexican citizens living in areas that were part of the Mexican Cession faced was that they were separated from white settlers.
their families were forced into slavery.
they did not know how to farm.
their families lived in Mexico and the US.

Their families lived in Mexico and the US.

Explanation: It is the only option that makes sense.

frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. but frederick disliked rifle shooting and horseback riding. unlike his father, he was interested in french literature. he enjoyed poetry and music and, like some others of the enlightenment, he scoffed at religion. his father thought him soft, frivolous and unmindful of his duties. and when frederick refused to put his signature on a right to succession, for a few moments his father strangled him.