Which product development strategy did NASA implement after discovering the Hubble Telescope's primary mirror flaw in 1990?

The Hubble Space Telescope represents one of astronomy's most significant product developments, revolutionizing our view of the cosmos. But bringing this complex scientific instrument from concept to launch involved intricate product development challenges, strategic pivots, and marketing decisions. This poll tests your knowledge about the business and development side of this iconic astronomical tool that changed our understanding of the universe.

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Complete telescope replacement via Space Shuttle mission
Installation of COSTAR (Corrective Optics Space Telescope Axial Replacement) during a servicing mission
Remote software recalibration that digitally corrected image distortion
Limiting Hubble to infrared observations only, where the flaw had minimal impact