What did louis sullivan's designs emphasize?
vertical lines using steel frames
vertical lines using an open floor plan
horizontal lines using an open floor plan

The correct answer is A) vertical lanes using steel frames.  

Louis Sullivan designs emphasized vertical lanes using steel frames.

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.

explanation:

japan participated in world war i from 1914 to 1918 in an alliance with entente powers and played an important role in securing the sea lanes in the west pacific and indian oceans against the imperial german navy as the member of the allies.