Look at the dictionary definition for the word pacified.
pacified / 'pa-se-fi / adjective: soothed
Based on this definition, which sentence is the best use of the word pacifier?
O His strongest trait as a pacifier is his aggressiveness.
O The treaty did not work as a pacifier to the conflict.
o We need a pacifier to end the conversation.
O The eloquence of the pacifier is putting the audience to sleep.