pls help idk know this i say a idk

Select the detail that best supports the author's point of view in “Eyes on the Skies.”

A.
Machu Picchu was an important city to the Incas.

B.
There were only about 750 dwellings in Machu Picchu.

C.
The royal family had a retreat in Machu Picchu.

D.
Each year the Incas held a Festival of the Sun to honor the sun.