Final answer:
The 'women's era' between 1900 and 1930 refers to advancements in women's rights. These advancements impacted women of different classes and ethnicities by increasing their opportunities and involvement in public life.
Step-by-step explanation:
The term 'women's era' refers to the significant advancements in women's rights during the 30 years between 1900 and 1930. During this period, women experienced changes in their experiences and opportunities, impacting women of different classes or ethnicities in various ways. For example, more women acquired formal education, entered the paid workforce, and became engaged in public life. This led to the growth of the women's suffrage movement and victories for women's rights. Additionally, middle-class women joined organizations like the National Association of Colored Women's Clubs and the Women's Christian Temperance Union.