Instead of transparent glass windows in the johnson building, wright used pyrex tubes open corridors sheets of plastic wooden shutters

Pyrex tubes

Explanation:

Located in Racine, Wisconsin, the SC Johnson and Son Administrative Building is one of Frank Lloyd Wright's most important statements about the nature of office buildings. H.F. Johnson Jr. commissioned Wright the project for an administrative building for the family business world headquarters, and in 1936 Wright's designs were approved and the building officially opened in April 1939.

The circular concrete pilars are connected by almost 70 kilometers of Pyrex glass tubes that illuminates the spaces with natural light. The use of Pyrex glass tubes allowed a lot of diffused light to enter the interior of the building and made the large room very well lit with indirect light and very little glare, resulting in a creative work environment.

the correct answer is d.

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