Final answer:
The answer to the question is 'mercy', as it was not one of Benjamin Franklin's thirteen virtues which were part of his moral code for personal improvement.
Step-by-step explanation:
The question asks which of the following was not one of the Benjamin Franklin's thirteen virtues. According to Franklin's autobiography where he lists his thirteen virtues, mercy is not one of them.
The virtues that Franklin did list include temperance, silence, order, resolution, frugality, industry, sincerity, justice, moderation, cleanliness, tranquility, chastity, and humility. These virtues were part of Franklin's moral code and were designed to improve personal character and conduct.