challenge: What is the symbolic meaning behind the three large windows on the facade of Casa dei Tre Oci?
  
  A. They represent Mario de Maria's immediate family: his son, wife, and himself
  B. They represent the three aspects of the Venetian dialect
  C. They signify the three main materials used in the construction of the house
  D. They symbolize the three main artistic influences on Mario de Maria's work
  Answer: 