Answer:
<h2>D.Two staves together</h2>
Explanation:
The Grand Staff is used for piano music and has two staves of five lines that are connected on the left with a brace. The bar lines are drawn through both staves and the space in between them. The top staff uses a treble clef, or G clef, and the bottom staff uses the bass clef, or F clef.
It covers all 24 Major and minor keys. 24 preludes and fugues
