Which innovative product design feature allows the James Webb Space Telescope's massive primary mirror to fold for launch and then unfold in space?

The James Webb Space Telescope (JWST) represents one of the most ambitious product design achievements in astronomical history. Launched in December 2021, this technological marvel required revolutionary packaging design to survive launch and deployment in space. Test your knowledge about the product design challenges and innovations that made this groundbreaking astronomical tool possible!

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Origami-inspired segmented mirror design with 18 hexagonal beryllium segments that fold and unfold using precision actuators
Inflatable mirror technology that expands when exposed to solar radiation
Liquid mirror that solidifies through freezing when exposed to the vacuum of space
Self-assembling nanobots that construct the mirror in orbit using materials harvested from space debris