A physical therapist treating a patient with a physical therapist assistant decides to discontinue the scheduled physical therapy session due to a suspected pulmonary embolism and requests further consultation from the attending physician. Which of the following clinical findings best supports the therapist's hypothesis?
A) Partial pressure of oxygen of 82 mmHg
B) Resting respiratory rate of 14 breaths per minute
C) Resting heart rate of 100 bpm
D) Increased cough with the presence of hemoptysis