Answer:
The correct answer is option B. "There were plenty of land and resources available out West".
Step-by-step explanation:
There are different reasons why people migrate from one location to another, and the ones who are positive and attractive in the destination place are called "pull factors". When Americans moved west in the 1800s, one pull factor was that there were plenty of land and resources available out West. The reason is that this is an attractive element of moving west, which is the destination place in Americans migration in the 1800s.