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What is Our solar system is very large. It includes the eight planets that turn around the sun. These planets include Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. There are also hundreds of thousands of smaller planets in this system. They are called asteroids. Each asteroid is much smaller than any of the eight large planets.
What is the main idea of this text passage?
A. Our solar system is made up of the Sun, the nine large planets and many asteroids.
B. Pluto used to be a planet but now is a dwarf planet.
C. There are eight large planets in our solar system.
What is "Our solar system is made up of the Sun, the nine large planets and many asteroids."