Which theme does Jacques-Louis David's The Oath of the Horatii depict?

A. Individuals should put their own interests aside for the good of the family.
B. When one makes a promise to someone else, one should always keep it, even until death.
C. Children should always obey their father because he is the head of the family.
D. Nothing is more important than loyalty to one's country, not even one's family.

David, Jacques-Louis. The Oath of the Horatii. 1784, oil on canvas, Musée du Louvre. Scala / Art Resource, NY.