Which option lists all the vertebrobasilar insufficiency signs and symptoms?

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Vertebrobasilar insufficiency involves the brainstem and cerebellum, so its signs touch on vestibular, cranial nerve, and sensory pathways. Dizziness or vertigo, diplopia, and dysarthria reflect brainstem and cranial nerve involvement, while dysphagia adds another bulbar sign. The tendency for sudden falls or loss of consciousness (drop attacks/DLOC), along with nausea, numbness, and nystagmus, covers autonomic/vestibular symptoms and sensory findings that commonly accompany posterior circulation ischemia. The option that lists this full range—dizziness, diplopia, dysarthria, dysphagia, drop attacks or LOC, nausea, numbness, and nystagmus—best represents the complete presentation of vertebrobasilar insufficiency. Other options miss one or more key signs, such as omitting bulbar symptoms, vestibular signs, or sensory changes, making them incomplete.