Question

interpreting problem - solution text structure
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
what steps did astronauts take to repair the hubble space telescope?

• they installed corrective optics and adjusted its orbit.
• they replaced its primary mirror and recharged its batteries.
• they added solar panels and upgraded its imaging instruments.
• they replaced its external shell to protect it from further damage.

Explanation:

The text states astronauts captured Hubble with the shuttle's robotic arm, installed the corrective optics system (COSTAR), and nudged it into a slightly higher orbit. This matches the first option, while the other options describe actions not mentioned in the provided text.

Answer:

A. They installed corrective optics and adjusted its orbit.