Questions 14 to 16 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage. Why does the professor mention the architect Frank Loid Wright
A．Because many architects studied with Wright. B．Because Wright started the practice of "landscaping". C．Because Wright used elements of Envelope Building. D．Because most of the houses Wright built were made of ston