Answer:
The answer choices for this question on USA Test Prep is:
A) a textbook used in a health class for college level students
B) someone suffering from excessive stress who was interviewed and videotaped
C) the web site that originally produced this article and other health-related articles
D) a current study on the effects of stress on the body published by a medical journal
So to verify the accuracy of the physical reactions to stress mentioned in the article stated, the best reference source would be (D) a current study on the effects of stress on the body published by a medical journal.