Which of the Following Persons Is Most Likely a Candidate

Which of the following persons is most likely a candidate for primary hypersomnia?

A) A 50-year-old who has wakeful periods during the night and naps during the day following the death of her husband
B) A 6-year-old who wakes up in the middle of the night after having a nightmare and is tired the next day
C) An obese 40-year-old who has snoring and periods of apnea at night and is tired the next day
D) An 18-year-old college student whose mother complains he sleeps all night and still naps during the day