Identify the persuasive and rhetorical techniques in this passage: "Then came the opportunity last September to talk with some of the leaders of the economic community. In these negotiating sessions certain promises were made by the merchants, such as the promise to remove the humiliating racial signs from the stores. On the basis of these promises, Reverend Shuttlesworth and the leaders of the Alabama Christian Movement for Human Rights agreed to call a moratorium on any type of demonstration. As the weeks and months unfolded, we realized that we were the victims of a broken promise. The signs remained." -Letter from a Birmingham City Jail