PLEASE HELP DO NOT WASTE ANSWERS URGENT WILL MARK BRAINLIEST

When I first looked at that I thought A or D. B and C are point less. Imma say A

gold discovery in california, and pioneer settlers were sometimes pulled west because they wanted to make a better living. others received letters from friends or family members who had moved west. these letters often told about a good life on the frontier. the biggest factor that pulled pioneers west was the opportunity to buy land.

welcome mark brainliest i am trying to get to the next level.

buildings sir and respect