Which of the following is the definition of an asteroid

Which of the following is the definition of an asteroid?

A. Irregularly shaped bodies which are believed to be leftovers from the beginning of the solar system

B. Celestial objects that orbits another body in space
C. Similar to stars in the sky but they are much closer to the Earth
D. The name of the rings encircling several planets of the solar system

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Đáp án đúng là: A

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