The Wagner Act was instrumental in... 1 point O ... bringing an end to voter discrimination.
...electrifying a large part of rural America.
O
...increasing the size and influence of
various labor unions.
O ...making classical music more popular.

C. Increasing the size and influence of various labor unions.

Explanation:

The Wagner Act of 1935, also known as the National Labor Relations Act (NLRA), is an act enacted in the law to ensure the rights of the workers and draft legal structure for labor unions to work under.

The Wagner Act was instrumental in increasing the size and influence of various labor unions. The act ensured to protect and give the employees and workers right to self-organization, form their labor organizations, or join and assist them.

Therefore, option C is correct.

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