According to the passage, Wagner asserts which one of the following about the roles of architect and engineer? A. The architect should make decision about aesthetic issues and leave decision about technical matters to the engineers. B. The engineer has often developed the powers of aesthetic judgment previously thought to be unique to the architect. C. The judgment of the engineer should be as important as the judgment of the architect when decisions are made about aesthetic issues. D. The technical judgment of the engineer should prevail over the aesthetic judgment of the architect in the design of modern buildings. E. The architect should acquire the knowledge of technical matters typically held by the engineer.