Q: Identify the classification system that corresponds to each description. Uses numbers: (A or B)
Uses letters: (A or B)
Used internationally: (A or B)
Used mainly in U. S. colleges and universities: (A or B)

possible answers:
A: Library of Congress System
B: Dewey Decimal System

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i believe it is he has been given the drum as a joke.

this is a good question! i'll do some research and come back when i have the answer!

"the tune the he might never know again." this part build anticipation. dexter got extremely happy by the piano tune. he could see what he was living at that moment in his life throught this feeling. the reader might want to learn more about his happy life. in fact, he called it a state of   'ecstasy'. the fact that he had got in a mood of intense appreciation and that everything about him was extremely bright and glamorous might lead the reader to feel that this state of happiness may not last long. the two parts from the excerpt that exemplify the anticipation are: " the sound of the "; " it was a know again."