Which of the Following Does Not Illustrate an Emulation Effect

Which of the following does not illustrate an emulation effect?

A) An underage drinker goes to a bar because earlier he had observed many underage drinkers there who were not asked by the management for identification.
B) A person attending a lecture wishes to ask the speaker a question during the course of the talk, but she decides against it because no one else has been interrupting the speaker to ask a question.
C) A person learning to ride a horse watches her instructor's jumping technique very carefully, then tries to copy it.
D) A boy who is interested in learning how to live in the wilderness with minimal tools gets a library book on survival in the wilderness.