What is the unifying theme of the images and symbols found in the mosaic program of San Vitale?

A) The martyrdom of Saint Vitalis
B) Christ's redemption of humanity
C) The life of the Virgin Mary
D) The crucifixion and resurrection of Christ

The mosaic program of San Vitale in Ravenna, Italy, is centered around the theme of Christ's redemption of humanity. This theme is depicted through various images and symbols throughout the church, emphasizing the theological significance of Christ's sacrifice and its role in the salvation of humankind.