What type of error is present in the underlined sentence? (comma splice, fragment, run-on)

Which is the best revision to fix the error?

(adding a comma after instrument, adding a semicolon after instrument, adding a comma after play)

passage:

Many people play a musical instrument music can be soothing. A lot of schools teach the recorder; it is inexpensive and easy to play. The guitar is another excellent instrument for beginners, it takes more practice than a recorder.