No one contributed more to the design of skyscrapers than chicago's

a. frank lloyd wright.

b. potter palmer

c. louis sullivan

d. frank j. sprague

No one contributed more to the design of skyscrapers than Chicago's Louis Sullivan. He is known as the "father of skyscrapers" and built the Prudential building as well as the Wainwright building.

The gregorian chant was a major cultural milestone in the middle ages. it was one of the first codified forms of music meant to be played as written, where previously it was difficult to mass-produce and disseminate any music. what's more, these chants were also some of the first examples of musical notation: the notes and bars of today's music sheets are a reflection of centuries of evolution beginning with these chants. it became official throughout the entirety of the catholic church, meaning that nearly all of europe followed this musical notation and styling.

Sure, i'm interested.the answer is yes.