Treponema Pallidum and Borrelia Burgdorferi Can Be Distinguished from Each

Multiple Choice

Treponema pallidum and Borrelia burgdorferi can be distinguished from each other on the basis of which of the following?

A) Only T pallidum has axial filaments.
B) Only B burgdorferi has an outer sheath.
C) Only B burgdorferi can be grown in the laboratory on artificial media.
D) Only T pallidum stimulates IgM production against the membrane proteins.