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39. According to the passage, which of the following statements best describes the movement of the Sagittarius Dwarf with respect to the Milky Way?

  • A. It appears to be in a roughly polar orbit around the Milky Way.

  • B. It appears to orbit the Milky Way at an angle of roughly forty-five degrees.

  • C. It follows the movement of the stars in the Milky Way’s disk, though at a slightly faster rate.

  • D. It once followed the movement of the stars in the Milky Way’s disk, but now seems to move erratically along its own path.