Is there a certain excerpt you're supposed to derive the answer from?
Answer:
https://dit69.pro/duoc-2-em-gai-dam-lam-tinh-suong-vai-chim/
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.
It is a bit confusing on why you said 40,0000 with four zeros
But based my assumptions with calculations, here are my answers:
40,0000 with five zeros or 400,000÷60=6666.67
40,000 with four zeros=666.67
I think the correct answer is D.