It's C
The north had the money, the people, and the industrial power to branch out the railroad networks. So following markets and money. The north built networks to the west.
The south in contrast was did not have the capacity to construct as much railroads as the north did so therefore there was less western expansion. As well the south had more interests building canals and shipping product of the states to England.
(The final defeat of the Moors inspired) King Ferdinand V and Queen Isabella wanted to look beyond Spain's boarders for wealth and glory (and Columbus's plan offered that,) so they agreed to fund (support) Columbus's voyage
The colonists during the BTP dressed like Indians so they could not be recognized, and not directly blamed. I hoped that helped. <span />
Answer:
Mexican American is the one