Photographic reproduction was possible with the development of

a)  glass-plate negatives.
b)  flexible film.
c)  copper plates.
d)  non-toxic chemicals.

a)  glass-plate negatives.

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How many of Beethoven's conversation books still exist?

a. a half dozen or so b. 2 c. around 140 d. 63

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Which of the following composers was extremely important to the development of romantic piano music?A) Frédéric ChopinB) Franz LisztC) Robert SchumannD) Richard Wagner

What will be an ideal response?

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