If youre asking for school then the easiest answer to bs is the religious one. "God"
D is my guess correct me if I’m wrong
D.: Congress established the Pendleton Service Act, after the assassination of President Garfield our 20th president.
The commission was created to administer the civil service of the United States federal government.
You could check out this website:
https://newrepublic.com/article/126987/remaking-american-west
or this one:
http://www.ushistory.org/us/18e.asp
i'm not really sure what info you want tho..