Final answer:
The best revision for the sentence is option D, which specifies the agent (the publication) and the specific voices being amplified (young climate activists), maintaining the original sentence's intent and context.
Step-by-step explanation:
The best revision for noun phrase placement in the sentence 'the author will help amplify marginalized voices' while keeping in mind the context provided is option D: 'the publication of the author's article will amplify the voices of young climate activists.' This revision clearly specifies what will amplify the marginalized voices (the publication), whose voices will be amplified (young climate activists), and its direct relationship with the author to maintain the original intent of the sentence.
The given context stresses the importance of amplifying diverse voices in literature and how students like the one analyzing the argument can play a part in this process through critical engagement with texts. It acknowledges the shifts happening regarding who has a voice in literature and the potential impact of different perspectives in fostering change within society.
Considering the nuances of the phrasing, option D offers a more precise and active construction, directly tying the impact of the publication to the author and giving a specific group whose voices will be amplified, aligning well with the given context and the broader discussions on representation in literature.
Therefore, the final answer is option D.