Alex pulled an all-nighter to study for their exam. While they were taking the exam, they realized that they were so sleep-deprived that they couldn't remember any of the concepts that they were studyingabout. The inability to recall long-term memories due to a lack of sleep matches which theory of sleep?

2. Research shows that in order to better remember exam concepts a person should study in an environment that simulates the exam environment. For example, if a person takes the exam in an air- conditioned room, they will be able to recall the information better if they studied in an air-conditioned room as well. Which concept best explains this phenomenon?

3. Which of the following statements about major depressive disorder is TRUE? 

A. Major depressive disorder is characterized by extree mood swings that cycle between depressive and manic episodes. 

B. People who have major depressive disorder experience uncontrollable fear that is disproportionate to the actual danger that the person is in. 

C. Psychologists group the symptoms of major depressive disorder into positive symptoms, negative symptoms, and cognitive deficits 

D. None of the above