Respuesta :
The significant changes that can be seen in workforce during the 1990s is that Union membership increased.
What is workforce ?
workforce serves as a group of workers from different areas of professions which are
engaged in a specific activity .
Therefore, during 1990s the workforce group increased in numbers because people believe they can fight for their right as a group of workers.
Learn more about workforce at;
https://brainly.com/question/17320867
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