Between 1890 and 1932, a legal view emerged that unions:

A) Were illegal because they interfere with free trade.
B) Were unconstitutional because they violate First Amendment rights.
C) Were legitimate but should be controlled by legal regulation to make sure they are serving the public interest.
D) Were necessary to a free, democratic society.

The legal view that emerged between 1890 and 1932 was that unions were legitimate, but they needed to be controlled by legal regulation to ensure they serve the public interest. This view led to the creation of labor laws that both protected workers' rights and set limits on union activity. It was a compromise approach that recognized the importance of unions but also sought to prevent any disruptions to the economy or public order.