The quest for height of skyscrapers such as Burj Khalifa can be compared to which earlier style of architecture?

Early examples of art photography often imitated:

A. Renaissance mosaics. B. the Dada photographic collages of Hannah Höch. C. film stills from grade-B Hollywood movies. D. Leonardo da Vinci's realistic architectural designs. E. the aesthetics of painting.

How did Debussy elicit new timbres from the piano?

a. composing harsh tone clusters b. instructing the performer to actually open the piano and pluck the strings by hand c. literally removing the hammers from the instrument d. instructing performers to play ultra-smooth lines at a persistently soft volume