Answer: I think that A would be the best answer
Explanation: it explains more about the story
They are not the facts who change people´s behavior, it is the emotion who has the power to do it, the stories and the irrational impulses who change it.
For example, the smokers do not stop smoke for statistics, they finally do it if a close relative or themselves get sick for that habit.
According to Blaise Pascal "the heart have reasons that the mind does not get it"
Ron knew his choice would give Mark another reason to pester and tease him.
Pestering and teasing is a direct conflict between the characters.