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Chief Editor
 Mar 17, 2024
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While researching a topic, a student has taken the following notes:

* Astronomers estimate that the number of comets orbiting the Sun is in the billions.
* 81P/Wild is one of many comets whose orbit has changed over time.
* 81P/Wild's orbit once lay between the orbits of Uranus and Jupiter.
* The comet's orbit is now positioned between the orbits of Jupiter and Mars.

The student wants to make and support a generalization about the orbits of comets. Which choice most effectively uses relevant information from the notes to accomplish these goals?
Difficulty: Hard
A:

Astronomers estimate that the number of comets orbiting the Sun is in the billions; the comets' orbits may change over time.

B:

Like Uranus, Jupiter, and Mars, billions of comets orbit the Sun.

C:

One example of a comet is 81P/Wild, whose orbit around the Sun once lay between Uranus's and Jupiter's orbits but is now positioned between those of Jupiter and Mars.

D:

A comet's orbit around the Sun may change over time: the orbit of comet 81P/Wild once lay between the orbits of Uranus and Jupiter but is now positioned between those of Jupiter and Mars.

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