Which of the following is true about louis henry sullivan

Louis Henry Sullivan was an American designer, and has been known as the "father of skyscrapers" and "father of modernism". He is considered by numerous as the designer of the advanced skyscraper, was a persuasive engineer and commentator of the Chicago School, was a tutor to Frank Lloyd Wright, and a motivation to the Chicago gathering of draftsmen who have come to be known as the Prairie School. Alongside Wright and Henry Hobson Richardson, Sullivan is one of "the perceived trinity of American architecture".

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.                                       sorry i just need points