Final answer:
The classic American skyscrapers of the 1920s expressed a 'modern' style by focusing on simplicity and showcasing steel structures.
Step-by-step explanation:
The classic American skyscrapers of the 1920s expressed a 'modern' style by focusing on simplicity and showcasing steel structures.
These skyscrapers removed historical references and ornamentation in favor of functionalist details.
They displayed their functional and structural elements, exposing steel beams and concrete surfaces.