Answer:
The correct answer is: The Well-Tempered Clavier.
Step-by-step explanation:
The Well-Tempered Clavier is a collection of Johann Sebastian Bach’s (1685-1750) 24 preludes and 24 fugues issued in two volumes (Book I – 1722 and Book II – 1742).
It contains the intricacies of each of the 12 major and 12 minor keys and it is considered the most-influential undertaking for the solo keyboard of the Baroque.