What led to the growth of unions in washington?

The higher wages and other benefits like health and insurance are higher in Washington; hence the leads to the growth of unionism.

Explanation:

Unions in Washington earn higher wages and most definitely to enjoy all other benefits like insurance and health after retirement. This has lead to high rate of workers joining the union so as to protect their interest compare to others that are not part of the union.

Unionism in Washington resulted into higher standard of living union members earn an average of 7.2 % in wages and benefits compared to the non-union ones.

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explanation:

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plz mark brainliest i would appreciate it btw i live in michigan too xd