Answer: B. Charity.
According to Foot, charity is a virtue that benefits the community rather than self because it promotes the protection of the rights of others. While temperance, wisdom and courage are virtues that lie within the same construct, charity as a virtue inherently benefits the community.
Another explanation is that charity gives one pause to consider how their actions affect another person. Charity, according to Foot, holds one back when “greater good” is measured against what is morally right.