An adaptation is changing to improve an existing work
Since 'voice' in literature refers to the style of a certain writer, the words he uses, the sentences he makes, I would say that the answer here is D) the overall presence of a personality behind the text.
A) isn't correct because nonfiction isn't that subjective
B) description isn't that important
C) nonfiction has nothing to do with fictional stories
The answer to this question is option B.
Most readers already know this information.
The words "of course", in this statement, makes it clear that this information is redundant, since it is known for most of the people, because since an early age, everyone eat this kind of candy, and it is never served in a plate, to be eaten with cutlery, but it is a finger food. Children, especially, love to eat bonbons and delight with them.
