How Is Galactic Evolution Described by the Hubble Tuning Fork

How is galactic evolution described by the Hubble tuning fork diagram?

A) Galaxies begin as type E0 and evolve to lenticular and then continue as either normal or barred spirals.
B) Galaxies are created as either normal or barred spirals, but either eventually evolves to lenticular. These then evolve through the various types of ellipticals.
C) Everything starts as a lenticular galaxy. Then, for reasons not well understood, the subsequent evolution is either as a spiral (normal or barred) or as an elliptical.
D) We do not believe galactic evolution is described by the Hubble tuning fork diagram.

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