Which of the Following Is the Correct Order of Degeneration $\rightarrow$

Which of the following is the correct order of degeneration in Parkinson's disease?

A) Motor nucleus of the vagus $\rightarrow$ substantia nigra $\rightarrow$ raphe nucleus and locus coeruleus $\rightarrow$ temporal neocortex $\rightarrow$ temporal mesocortex
B) Motor nucleus of the vagus $\rightarrow$ raphe nucleus and locus coeruleus $\rightarrow$ substantia nigra $\rightarrow$ temporal mesocortex $\rightarrow$ temporal neocortex
C) Raphe nucleus and locus coeruleus $\rightarrow$ motor nucleus of the vagus $\rightarrow$ temporal mesocortex $\rightarrow$ temporal neocortex $\rightarrow$ substantia nigra
D) Raphe nucleus and locus coeruleus $\rightarrow$ motor nucleus of the vagus $\rightarrow$ substantia nigra $\rightarrow$ temporal neocortex $\rightarrow$ temporal mesocortex