Which of the following is NOT a reason the Spanish begin exploring West?

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.

The answer is d.  the north had organized schools, whereas the south had few organized schools.

Yea where are the options?