A Modified CRM Is Performed on a Patient with a Left

A modified CRM is performed on a patient with a left posterior vertical canal impairment.Upon sitting up at the end of the maneuver the therapist notices rotary transient nystagmus in the opposite direction from the original nystagmus.What could be an explanation for this phenomenon?

A) Contralateral canal stimulation
B) Decreased patient ability to fixate to inhibit eye movements
C) Cervico-ocular reflex responses to the maneuver
D) Some of the otoconia may have fallen back into the canal