Which innovative product design feature allowed the James Webb Space Telescope's primary mirror to be significantly larger than Hubble's while still fitting into a rocket?

The James Webb Space Telescope represents one of astronomy's greatest technological achievements and product development stories. Designed as the successor to the Hubble Space Telescope, its development faced numerous challenges, delays, and design innovations. Test your knowledge about the product development journey of this remarkable scientific instrument that's revolutionizing our view of the cosmos.

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Its folding, segmented mirror design that unfolds after launch
Using ultra-lightweight aerogel materials that weigh 90% less than traditional mirrors
An inflatable mirror system that expands in space using pressurized gas
A revolutionary digital mirror made of millions of micro-panels that self-assembled in orbit