During the mid-1800s, settlers passed over, but did not settle in the central part of the country. Which of these explains that migration pattern?

During the mid-1800s, settlers passed over, but did not settle in the central part of the country. Which of these explains that migration pattern?

Gold was discovered in California.

The area lacks rivers which were used to transport goods.

Native Americans already occupied the land.

The soil of the Plains isn't suitable for farming.