The correct answer is A) vertical lanes using steel frames.
<em>Louis Sullivan designs emphasized vertical lanes using steel frames.
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Louis Sullivan (1856-1924) was an American architect considered the major influence of modern architecture in the United States. He designed skyscrapers with modern styles. His designs emphasized vertical lanes using steel frames. In association with Dankmar Adler, he designed the Wainwright building of St. Louis and the Auditorium Building in Chicago.
