Liam is a college major from the University of Long Beach, California. He is forced to take a sabbatical from studies due to personal reasons and writes a detailed letter to his professor explaining the circumstances of his decision to discontinue the course. The medium of this communication between Liam and his professor is considered to be lean because _____ .
A) Liam cannot receive a response from his professor immediately
B) the nature of the content of the communication is highly personal
C) Liam offers well-explained reasons for his decision to discontinue the course
D) a letter is a relatively more expensive mode of communication than e-mail
