The completion of the first transcontinental railroad in 1869 encouraged settlement of the American west by proving easier travel and it took less time.
I believe it would be B polis
Answer:
Related to the slave state and free state
Explanation:
The North and South states were anxious about new territories because they feared the balance of the states in America. Both worried the states favouring slavery and those opposing slavery. The North and the South wanted to hold the stability of power in the Senate by balancing the powers. Many of the Southern wanted to gain the upper hand on the issue of slavery.
