The Labor Strikes That Prevailed at the End of World

The labor strikes that prevailed at the end of World War II began to subside when

A) Unions were able to negotiate better wages and conditions.
B) President Truman threatened to seize the mines and railroads that had been shut down by strikes.
C) Truman sent in troops to quell a strike in the Midwest.
D) the CIO expelled several of its more radical affiliates.
E) All of these choices.