I believe it is A, but I wouldn't go by just my answer.
In general, it was the local and state governments that enforced these laws during this time, since the federal government lacked practically all powers to intervene in the states' affairs.
Answer:
He killed a group of proslavery settlers near Pottawatomie Creek.
Explanation:
I would say A. This was a scandal involving the illegal manipulation of contracts by a construction and finance company associated with the building of the Union Pacific Railroad in the United States between 1865 and 1869.
