During the James Webb Space Telescope's product development, which critical component required the most extensive redesign, adding approximately 7 years to the project timeline?

The James Webb Space Telescope (JWST) represents one of astronomy's most ambitious product development projects. Launched in December 2021 after numerous delays and redesigns, this technological marvel has revolutionized our view of the universe. This poll tests your knowledge about the complex product development journey of this groundbreaking astronomical instrument that took over two decades to complete.

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• The sunshield deployment system
• The primary mirror segments
• The cryogenic cooling system
• The communication array

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