Read the excerpt from "Machu Picchu: A City in the Sky.” The city of Machu Picchu is very large. It has over two hundred buildings. This mountain city has several levels. In between each level, there are terraces. The terraces have stone walls seven feet high. They hold up each level of the city. Visitors have to walk from one level to another on stone paths. They also have to climb steep stone steps. There are thousands of stone steps in the city. The Incas must have had strong legs!

What details are included in the excerpt to describe Machu Picchu? Check all that apply.

a)over two hundred buildings
b)city has several levels
c)terraces have stone walls
d)visitors get tired of climbing
e)thousands of stone steps