Final answer:
Cushing's triad is characterized by hypertension, bradycardia, and irregular respirations, and indicates a decreasing level of consciousness.
Step-by-step explanation:
Cushing's triad is a set of late signs and symptoms that indicate a decreasing level of consciousness. The correct option is C) Hypertension, bradycardia, irregular respirations. This triad is caused by increased intracranial pressure which leads to hypertension (high blood pressure), bradycardia (slow heart rate), and irregular respirations.