What is the typical diameter measurement for mammalian axon ( it & cite it!)? Take a moment and just consider how many axons are in this one nerve (best estimate)?

A) 0.1 to 1 micrometer (Source: Neuroscience Online)
B) 1 to 10 micrometers (Source: Encyclopedia of Neuroscience)
C) 10 to 100 micrometers (Source: Cellular and Molecular Neurobiology)
D) 100 to 1000 micrometers (Source: Nature Reviews Neuroscience)