(A) honor the Prince’s commendable victory and prepare for the victory’s showcase to posterity, to achieve finally
Parallelism error; to bring to [honor...and prepare], to achieve. We should either get rid of the comma or supplant it with "and"
(B) honor the Prince’s commendable victory and prepare for the victory’s showcase to posterity, achieving finally
Correct(C) honor the victory of the commendable Prince and prepare for the victory’s showcase to posterity, as a means to achieve finally
as far as ı know commendable (meaning praiseworthy) is generally used for someone's behavior ı am not sure whether saying that someone is commendable is right.
Also why split "as a means to..." with a comma; sculptors spent many days to bring...., as a means to. It need not be separate IMO
(D) honor the victory of the commendable Prince and prepare for the victory’s showcase to posterity, as a means achieving finally
as far as ı know commendable (meaning praiseworthy) is generally used for someone's behavior ı am not sure whether saying that someone is commendable is right.
As a means achieving? that's not right as a means for would be better
(E) give honor to the Prince’s commendable victory and prepare for his showcase to posterity, as a final achievement of
his refers to Prince so this gives illogical meaning that they are putting the very prince to the showcase