A 45-year-old man presents with right-sided weakness. His symptoms quickly resolve to the point at which his only objective neurologic deficit is a mild degree of finger-to-nose dysmetria on the...

A 45-year-old man presents with right-sided weakness. His symptoms quickly resolve to the point at which his only objective neurologic deficit is a mild degree of finger-to-nose dysmetria on the right. His MRI scan reveals a rather large new infarction. Which vascular territory is most likely affected?

A. Left vertebral artery

B. Right PICA

C. Right vertebral artery

D. Left MCA

E. Left PICA