Which sentence about Helen Keller’s autobiography is true? It is not credible because it is the story of Helen Keller’s life, and Keller is the author.
It is credible because Helen Keller is the author, writing about her own life.
It is not credible because there are too many details that cannot be proven.
It is credible because it describes events from Helen Keller’s childhood.

B. It is credible because Helen Keller is the author, writing about her own life.

Explanation:

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is there any anwser chocies

"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."