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I think it’s C but i could be wrong
The correct answer is "changing."
For a long time, women were expected to be very feminine. To this end, long skirts and long hair were the norm. In the 1920s, however, things began to change. Women began to become more independent, wear shorter skirts, and cut their hair.
Iambic pentameter is the name given to a line of verse that consists of five iambs (an iamb being one unstressed syllable followed by one stressed, such as "before"). two lines of verse, usually in the same meter and joined by rhyme, that form a unit.
So pretty much there it consists of five