The Caloric Reflex Test __________

The caloric reflex test __________.

A) is a neurological test of brainstem function which uses warm or cold water to alter the vestibular fluid and generate reflexive eye rotation.
B) is a neurological test of reflex function which uses hot water to produce pain and evoke a reaction.
C) is a psychophysical test which measures the sensitivity of an observer to variations in water temperature.
D) is a psychophysical test which uses hot water to measure the pain threshold of participants.