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.
I believe it's foot, i'm new please don't hurt me. Hope it helped.
Climax is the section of the plot is best represented by the passage above
Interpetation is something a reader does in response to a text. Hope this helps!