Chenille is writing a research paper about the effects of over-the-counter teeth whitening products on tooth enamel. Her thesis is that over-the-counter products may be harmful. She has decided to use the internet for part of her research study. After doing a search for information, she comes across an article on the homepage for the American Dental Association about the effects of over-the-counter teeth whiteners. The article is credited to Dr. Susan Leeds, a cosmetic dentist from New York and says that over-the-counter teeth whiteners are not harmful but may not be very effective. She bookmarks the site and continues to research. Later, she comes across a website called White Teeth Now. There is a commentary that is written by an anonymous source about how over-the-counter whiteners can lead to more cavities and sensitive gums. What is one way for Chenille to decide which source is more credible?
A.
The White Teeth Now site has a piece that agrees with her thesis, so it is more credible.
B.
The American Dental Association is more credible because it came before the White Teeth Now site when Chenille did a search.
C.
The American Dental Association gives the name of the author of the article, so it is more credible.
D.
The White Teeth Now is more credible because it was posted the day before, so it is more up-to-date.