I believe it is B—California was admitted as a free state.
We seized lands from the indians, becuase we believed we had the god given right to extend america to the pascific ocean.
They created a new economy by recognizing the issues that the poor people faced in 1890s to 1920. Remember the rich made off money of the poor, after a while when the poor discovered that was happening. Workers went on strike for the such low income and working conditions.