Answer: No, you can not say it is possibly. You must say, in order to be grammatically correct, it is possible.
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Explanation:
Answer;
-It determines the range of attitudes that a text can effectively express.
The voice impacts the tone in that it determines the range of attitudes that a text can effectively express.
Voice is the quality that makes an author's unique and conveys the author's attitude, character and personality. In other words it is a characteristic speech and patterns of a narrator.
