Answer:
The grand staff is the combination of two staves, treble and bass clef, joined together with a bracket. It is most commonly used to notate piano music.
Explanation:
Hope this helps :-)
Please don't give me credit for this this was what I found :p
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The beats, meter, tempo, syncopation..
Modern DSLR cameras use the Phase Detect autofocus method to determine the correct point at which to focus the lens. This method is fast and generally accurate, and operated by light travelling through the lens. When you half-press the shutter button on your DSLR while looking through the optical viewfinder, it’s Phase Detect autofocus that’s used.
I would say B but I’m not sure