The statement that describes the purpose correctly:
D). to criticize the United States...Holocaust sooner.
The purpose is designated as the intent or the cause which is intended to be successfully conveyed to the audience by the author.
In this book, the author aims to critique the action of the United States for not bringing the Holocaust to an end at the earliest.
This exemplifies that the author aims to communicate the ignorance displayed by the states in this matter and takes a strong stand against it.
Thus, option D is the correct answer.
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