Which designer juxtaposed medieval rose windows with modern elements, and helped popularize streamlining?

The correct choice is Norman Bel Geddes, who was a prominent figure in the early 20th century and played a significant role in the development of modern scene design. He is well-known for his innovative approach, which included blending historical elements like medieval rose windows with contemporary designs and techniques. Bel Geddes was influential in the streamlining movement, which emphasized sleek, aerodynamic forms that were both functional and visually striking. His work is characterized by an emphasis on how design could harmonize past aesthetics with the emerging modern style, making him a pivotal figure in transitioning theatre scenography into a new era.

The other designers listed, while important in their own right, did not focus on the same combination of historical and modern elements that Bel Geddes championed. For example, Robert Edmond Jones contributed significantly to American stage design but did so with a different stylistic approach, focusing more on expressionist and atmospheric scenic design rather than the fusion of historical and modern styles that Bel Geddes explored.