The Dix-Hallpike Test with the Left Ear Down Elicits a Transient

The Dix-Hallpike test with the left ear down elicits a transient up-beating nystagmus with a left torsion.What is the location and mechanism of benign paroxysmal positional vertigo?

A) Left posterior semicircular canal cupulolithiasis
B) Left superior semicircular canal canalithiasis
C) Left superior semicircular canal cupulolithiasis
D) Left posterior semicircular canal canalithiasis

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