Which unique packaging design feature was critical for protecting the James Webb Space Telescope's sensitive mirrors during launch?

The James Webb Space Telescope (JWST) represents one of humanity's most complex astronomical instruments ever built. Before it could begin its mission to observe distant galaxies, it had to survive the harsh conditions of launch and the vacuum of space. This required extraordinary product packaging and design considerations unlike any consumer product. Test your knowledge about how this $10 billion observatory was protected during its journey to space!

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A vacuum-sealed titanium shell that maintained constant pressure throughout launch
An origami-inspired folding mechanism that allowed the telescope to compact into the rocket fairing
A series of hydraulic shock absorbers filled with liquid helium to maintain cryogenic temperatures
A carbon-nanotube reinforced foam casing that dissolved after reaching orbit