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If your teacher tells you that a piece of music is a sonata, what do you know about it? out of the following questions

1. its chord progression

2. its form

3. its key

4. its time signature

In this case, knowing that a piece of music is a sonata tells you about its form. Sonatas typically have a specific structure and layout, with multiple movements (sections) that often include an exposition, development, and recapitulation.