Answer :
The main idea of women wearing the flapper is that they wanted to reduce their feminity and be seen as equals with men.
What is a Main Idea?
This refers to the expression of thought by an author which contains the central message of the text that he wants to convey to his readers.
Hence, we can see that from the given text, there is the use of narration to state the use of flapper by women based on social conventions and their shift from floor-length gowns to office wears and this was because they wanted to reduce their feminity and be seen as equals with men.
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