A．They are changed to make the site more interesting.
B．They are expanded to limit the amount of construction.
C．They are integrated into the design of the building.
D．They are removed for construction.
A．Because many architects studied with Wright.
B．Because Wright started the practice of "land-scraping".
C．Because Wright used elements of envelope building.
D．Because most of the houses Wright built were made of stone.
A．Protecting buyers of paintings.
B．Why copies of famous paintings are made.
C．How paintings are sold in the United States.
D．Protecting artists from illegal use of their work.