The Hubble Space Telescope has changed the way we see the universe. For almost a quarter of a century, it has sent vast amounts of images from space. When Hubble was launched aboard the Space Shuttle Discover in 1990, Mission Control saw something it hadn't expected: fuzzy images. The outer edge of the telescope's primary mirror had been ground too flat, and it was off by roughly one-fiftieth the thickness of a human hair. Astronauts went in to install a replacement camera and an instrument with corrective lenses. The fix proved that very difficult and complicated operations could be undertaken by shuttle astronauts.

Question

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According to the passage, the telescope's images were fuzzy because

Athe corrective lenses were off by one-fiftieth of a human hairBthe replacement camera was too difficult and complicatedCHubble had been launched aboard a space shuttleDHubble's main mirror had been ground incorrectly

Answer 1

According to the passage, the telescope's images were fuzzy because Hubble's main mirror had been ground incorrectly.