The correct answer is - d. The Nazca had an awareness of what shapes looked like from above.
The Nazca culture is interesting in many ways and there's a lot to say about them, but the thing that catches the eye the most are their geogliphs, which are huge.
The most intriguing part is that from the ground you can not see the shapes at all, as they are too big, so you can just walk right through them and have no clue about it. The only way possible to see them properly is from the sky, but the Nazca did not had airplanes or helicopters in order to see them. The most logical explanation is that the had an awareness as to how would the shapes they created looked like from above, and they were probably good in math as well in order to get the right proportions of their creations.
