Labor union membership in the us

1897–1934

a graph titled labor union membership in the u s from 1897 to 1934 has years on the x-axis and members in millions on the y-axis. membership gradually increased from 1897 to 1915, increased rapidly from 1915 to 1920, and then decreased from 1920 to 1930. membership in 1897 was less than 1 million and membership at the peak in 1920 was about 5 million.

which of these statements is supported by the information in the graph?

union membership increased more than five times between 1900 and 1920.
union membership declined after 1915, before rising again after 1920.
union membership was higher in 1905 than it was in 1910.
union membership reached its peak around 1930.