Which of the Following Sequences Correctly Arranges Nervous System Structures $\rightarrow$

Which of the following sequences correctly arranges nervous system structures from the largest to the smallest

A) neuron $\rightarrow$ axon $\rightarrow$ terminal button
B) neuron $\rightarrow$ terminal button $\rightarrow$ axon
C) axon $\rightarrow$ terminal button $\rightarrow$ neuron
D) axon $\rightarrow$ neuron $\rightarrow$ terminal button