Which of the following statements best summarizes the current research on sleep patterns of emerging adults?  a. The research showing delayed sleep phase syndrome and sleep debt is based almost...

Which of the following statements best summarizes the current research on sleep patterns of emerging adults?

 a. The research showing delayed sleep phase syndrome and sleep debt is based almost exclusively on low-income emerging adults who work full-time rather than attending college.

 b. The preference of being a morning person versus a night person changes with age due to increased levels of cortisol.

 c. Sleep debt has negative consequences for both cognitive and emotional functioning.

 d. Students who stayed up all night before exams thought they did worse than their peers who got a full-night’s sleep.