During a Classical Music Performance, a Concert-Goer Talks Loudly to the Person

Multiple Choice

During a classical music performance, a concert-goer talks loudly to the person sitting next to her. A man in another seat turns around, frowns at her, and says "Shh." This illustrates a ____________.

A) negative informal norm
B) positive formal sanction
C) negative informal sanction
D) prescriptive informal norm