In the Book of Revelation, what is the symbolic significance of the 'new Jerusalem' descending from heaven (Revelation 21:2) in contrast to the earthly Jerusalem?

A The new Jerusalem represents a restored earthly kingdom for the Jewish people, fulfilling Old Testament prophecies of national restoration. B The new Jerusalem symbolizes the ultimate and complete union of God with humanity, a perfected and eternal dwelling place free from sin, suffering, and death, surpassing the limitations and imperfections of the earthly Jerusalem. C The new Jerusalem is a metaphor for the institutional church, emphasizing its earthly authority and administrative structure. D The new Jerusalem represents a future technological utopia, where advanced technology will solve all human problems.