Question

the ingenious solution to hubble’s flaw was the corrective optics system called costar (corrective optics space telescope axial replacement). acting like a pair of glasses for the telescope, costar corrected the flaw in the primary mirror. in 1993, astronauts aboard the space shuttle endeavour captured hubble with the shuttle’s robotic arm and installed the new equipment, a moment that marked a significant leap in space technology. they also nudged hubble into a slightly higher orbit, further enhancing its functionality.
–windows to the universe: revolutions in astronomy
how did nasa solve the problem with hubble?
○ they replaced the mirror with a new one.
○ they launched a new telescope to replace hubble.
○ they developed a new system to correct the mirror’s flaw.
○ they put hubble into a totally different orbit.

Explanation:

The text states NASA used the corrective optics system COSTAR, a new system, to fix Hubble's primary mirror flaw, rather than replacing the mirror, launching a new telescope, or moving it to a totally different orbit (only a slightly higher orbit was done).

Answer:

They developed a new system to correct the mirror's flaw.