Augustine's Concept of a 'City of God' Can Be Described

Augustine's concept of a 'City of God' can be described by which of the following statements?

A) a city that attempts to balance out the needs and happiness of individuals with a need for a just and fair society
B) a city ruled over by individuals who have balanced souls who abide by reason and wisdom
C) a city that includes a chosen people who live in both a state of grace and an earthly city
D) a city that may be permitted to engage in warfare so long as the conflict is justified