A Patient Tells the Nurse That "Sometimes I Wake Up

A patient tells the nurse that "sometimes I wake up at night,and I have real trouble breathing.I have to sit up in bed to get a good breath." When documenting this information,the nurse would note:
(This question reflects the results an examiner may find during a complete physical examination.Content in this question is not necessarily addressed directly in Jarvis' Physical Examination & Health Assessment. )

A) orthopnea.
B) acute emphysema.
C) paroxysmal nocturnal dyspnea.
D) acute shortness-of-breath episode.