It cant be a because the first three paragraphs do not say that it wasn't a revolution, its says revolution is commonly misused.
it cant be b because that content is not in the first three paragraphs
it is not c because that is not what the question is. The soul purpose of the text is not answer that question. It describes what the revolution consists of.
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"The fight" is the main noun of the sentence and the pronoun "it" was used refer to the noun. Also, it's the last (and only) noun mentioned before the pronoun.
Friedan's attitude towards what she calls the 'feminine mystique' is that she sees the ideal of femininity as stiffing women's potential in the 1950's. Betty Friedan was a writer and activist of the 1950's and 60's.