Though Her New Office Didn't Have a Formal Dress Code

Though her new office didn't have a formal dress code, Cassie's coworkers laughed when they told her about how the person who previously held her position always wore jeans to work. This is an example of:

A) an introduction to the jargon Cassie will need for the job.
B) positive face threat for Cassie because she wants to wear jeans to work.
C) a story that tells Cassie the norms for appropriate dress.
D) tensions in the workplace caused by out-group status.