Final answer:
The purposes that shaped the authors' presentations of key information in the articles can be best described as providing information to support their claims.
Step-by-step explanation:
Based on the provided information, it can be concluded that statement D is the best description of the purposes that shaped the authors' presentations of key information in the two articles. The author of the first article gives reasons and evidence to support his opinion, while the author of the second article uses facts and reasons to predict future trends. Both authors are providing information to support their claims rather than trying to convince the reader to agree with their points of view.