A model of the solar system would solve the problem of A. The real-life solar system being too large to fit in a laboratory.
The solar system is very large as it contains 8 planets and one massive star, our sun. As such, it is simply too large to fit into a laboratory for easier study by students and scientists.
To solve this problem, a model of the solar system can be created that will be small enough to use in a laboratory but still enable us know more about the solar system.
Other options are wrong because:
In conclusion, models of the solar system are built because the solar system is too large to fit in places like laboratories where they are studied.
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