Question 10 of 10 How did Europe's first system of musical notation help singers?
O A. It showed the rhythm
B. It showed the shape of the melody,
O O O O
C. It showed the starting pitch,
D. It showed the tempo
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Photography has changed its subject matter quite a lot over the past few years. in the 1800's, it was considered normal for families to have  post mortem photos of their loved ones, and now that would be completely unacceptable. i think that photographers have always pushed boundaries and have been eager to capture everything, it is just society that changes their boundaries.