Angela sent an email to her best friend in which she teased her about getting her first B in a college course. Angela believed her teasing was good-natured and funny. Her friend responded that she was hurt and accused Angela of being insensitive and uncaring. Which aspect of Angela's email is LEAST likely to have contributed to this misunderstanding?
a) absence of expressive emotions
b) lack of nonverbal cues indicating her intent
c) absence of a tone of voice that would indicate her intent
d) the words she used to tease her friend