Which of the Following Correctly Describes the Trend in U

Multiple Choice

Which of the following correctly describes the trend in U.S. union membership?

A) Union membership has been decreasing steadily since the 1930s.
B) Union membership decreased from 1930 - 1960, but has been increasing steadily since.
C) Union membership peaked in the 1960s and has been decreasing steadily since.
D) Union membership declined until the 1980s, but has been increasing steadily since.