Last year, Mary-Ellen’s parents brought home a dog. Mary-Ellen was initially excited, but the dog was big and scary. Mary-Ellen froze every time the dog entered the room and she jumped every time the dog barked. Noticing that she feared the dog, Mary-Ellen’s parents put the dog out in the backyard and it is no longer allowed in the house. Now, Mary-Ellen can move around the house but she avoids going near the back door and does not enter the backyard. Mary-Ellen has become more used to the dog but has noticed that she is feeling more tired and has frequent colds. Question 1 Which of the following represents part of Mary-Ellen’s initial stress response when the dog was brought home? A. increased digestion B. constricted pupils C. decreased cortisol levels D. increased muscle tension