Answer:
B- Shaping
Step-by-step explanation:
Shaping is the way of shaping a person behaviour by analysing that person behaviour. Which is why You decide to try to promote greater participation in class discussion by first smiling at Ian thereby encouragingly him, when he merely looks interested in saying something, then smiling at him when he raises his hand, and then praising him when he actually makes a contribution.
This process is called SHAPING because he is trying to shape Ian behaviour by establishing the behaviour that is currently not learned by Ian and reinforcing his behaviour to the desired behavior by always smiling and praising him.