What Was the Purpose of the Civil Service Commission When

What was the purpose of the Civil Service Commission when Congress authorized its creation in 1881?

A) To award federal jobs on the basis of merit rather than patronage.
B) To prevent labor unions from organizing and engaging in collective bargaining.
C) To screen immigrants so each could be assigned a job for which they were educated or trained.
D) To set up job descriptions and pay scales in private industries.