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Which sentence does not contain any errors in comma usage? A. In Vienna musicians first played the harpsichord but then someone invented the piano. B. In Vienna musicians first played the harpsichord, but then someone invented the piano. C. In Vienna musicians first played the harpsichord, but, then someone invented the piano. D. In Vienna musicians first played the harpsichord but, then someone invented the piano.

Sagot :

All are wrong it looks like... Cause you need a comma after Vienna

I agree. You need a comma after Vienna. If A had a comma after Vienna, it would be right.