Answer:
A set of short piano pieces for young ladies could be published simultaneously in Vienna, Berlin, London, and Paris. The composer would make each set different -- Austrian style, German style, English style, French style -- to suit the particular audience, while keeping the same balanced phrasing and simple harmony in all of them.
Explanation:
This is not an accurate description of how vibrant human emotions are expressed in Classical music. In these lines, the author describes a way in which composer wrote music that was specifically made for a particular audience, while keeping the same basic ideas in all of them. This does not accuratel represent the extreme variety and intensity of usual Classical music.