Which one of the following best expresses the main idea of the passage? A. Modern architecture has been criticized for emphasizing practical and technical issues and for failing to focus on aesthetic concerns. B. Critics have failed to take into account the technological innovations and aesthetic features that architects have incorporated into modern buildings. C. Wagner's Modern Architecture provides architects with a chronicle of the origins of modern architecture. D. Wagner's Modern Architecture indicates that the founders of modern architecture did not believe that practical issues should supersede the aesthetic concerns of the past. E. Wagner's seminal text, Modern Architecture, provides the intellectual basis for the purely materialistic definition of modern architecture.