What were the effects of the civil service reform?

U.S. civil service reform was a major issue in the late 19th century at the national level, and in the early 20th century at the state level. Proponents denounced the distribution of government offices—the "spoils"—by the winners of elections to their supporters as corrupt and inefficient. They demanded nonpartisan scientific methods and credential be used to select civil servants. The five important civil service reforms were the two Tenure of Office Acts of 1820 and 1867, Pendleton Act of 1883, the Hatch Acts (1939 and 1940) and the CSRA of 1978.

Explanation:

d) a constitutional amendment