The house's windows were open mouths breathing in the night air. The breeze crept through the house dancing over the piano and knocked over most of the picture frames. One still stood. The picture of Baron von Cruger stood proud and at attention. The picture told a secret that no one had suspected. Inside the frame was a key to a box buried deep inside the house's basement. It was waiting to be found.

The author compares the house's windows to
A.
a dancing breeze.
B.
hidden secrets.
C.
a picture frame.
D.
open mouths.