Questions 11 to 13 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.
What is the professor mainly discussingA．The importance of function in the design of a building. B．A、number of modernAmerican architects and the important elements in their work. C．Three main elements that architect must think when designing a building and a famous architect. D．The important characteristics of the designs of one specific architect.
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