Hayabusa is a small asteroid probe... 問題編

JAXAのはやぶさに関する文章の問題編です。
実は、先日投稿した記事と同じですが、誤って削除してしまったので、再掲します。


Hayabusa is a small asteroid probe launched by the Japan Aerospace Exploration Agency (JAXA) in May 2003. It was designed to explore the asteroid Itokawa, and arrived there in September 2005. It collected rock and soil samples from the asteroid, and successfully brought them back to Earth. Later, JAXA launched Hayabusa2, which arrived at the asteroid Ryugu in 2018. Like its predecessor, Hayabusa2 collected rock and soil samples and returned them to Earth successfully in December 2020. The Hayabusa missions have become an important showcase of Japan's technological advancements in space exploration in the field of asteroid exploration.

Question:
What is the main purpose of Hayabusa missions?
(1) To explore the Moon
(2) To explore Mars
(3) To explore asteroids
(4) To explore Saturn's rings


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