Is There an Advantage in Using Redshift Z to Describe

Is there an advantage in using redshift z to describe the distances to faraway galaxies?

A) No. Because z is a known function of v (which function depends on whether the situation is relativistic or nonrelativistic) and v = H0d, there is no real advantage to using z rather than d.
B) No. Not all objects at the same d have the same z, so using z is actually a disadvantage.
C) Yes, z can be determined rather easily from spectra, whereas H0 is rather difficult to determine. So there is a real advantage in using z rather than d.
D) No. Because one cannot always be sure whether to use relativistic or nonrelativistic equations for z, z is somewhat ambiguous while d is unambiguous.

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