I feel like either C or D works, but in that context I'd choose D.
"Blessed are the peacemakers." Rulers want to promote the protection of their country and subjects to their citizens. A ruler would want to influence their subjects to protect and serve their country. By claiming that the peacemaker of the countries are "blessed", the ruler is pushing the idea that those who enlist to serve their country become better in the eyes of their ruler and God. The specific use of the word "blessed" shows that there was religious motivation in the creation of the Coat of Arms. This religious meaning would promote more people to support the ruler by enlisting as peacemakers.
