Based on information provided in the passage, we can infer that, in addition to water ice, Saturn’s rings might also have small amounts of:
Explanation:
As per the third paragraph, comet dust will discolour the rings of Saturn. Thus comet dust is also a component of the Saturn’s rings. According to the last sentence of the fourth paragraph, the rings were formed when an old set of Saturn’s moons were destroyed. Thus besides water ice, Saturn’s rings were also likely to have comet dust and rock particles. Hence, the correct answer is option 2.
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