TOEFL Listening: ETS-TOEFL听力机经 - PUG354D9B1NY4945P$

What does the professor imply when he says this: A. Insulated windows were not considered because of the number of windows in the design. B. A technology that is better than insulated windows was used in the facility. C. New industry standards for multiple-layered windows are being established based on this facility. D. Architects used multiple layers of glass as the standard window for this facility.