The way that the word affected the tone of the article can be depicted through the context clues given in the story.
Your information is incomplete. Therefore, an overview will be given. A tone simply means the mood that's implied by the word choice of the author.
In this case, it's important to read and understand the story. Then, look out for the hints that are given by the author. This is necessary to depict how the word describe the additional wages received by college graduates has an effect on the tone of the article.
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