D. They emphasize the idea that bicycles helped blur the gender roles.
Wheels of change is a book about how women started using bycicles to do several things, like working, or for fun, or to protest about injustices, by posing with a stache, and a man´s suit, Frances Benjamin sends a message that she could too do everything a man could do, including riding a bycicle.
Animal farm is a book about how the animals all get along when odd things start happening in the farm. The theme of animal farm is the idea of tyranny and how it would work in the farm. When the old pig has a dream about living free without people controlling them, he decides to turn this into a reality.
I don't think its necessary. do you?
I believe the answer would be the <em>third option, 70.</em>
