Answer: D. A news article about the safety of the dietary supplement
The source that is likely to provide the most reliable scientific information about a new kind of dietary supplement is A news article about the safety of the dietary supplement.
Step-by-step explanation:
A news article is the most trustful place for the information of dietary supplement because it is the one that is reviewed by the experts and professionals in the same field.
Also the best part is the review and news article contains both the pros and cons of the supplements.