Answer:
All off these things cause you to start smiling
Step-by-step explanation:
Mood linkage: This is referred to as an individual's propensity to participate and absorb in the existing mood of someone else's who is around him or her.
Conformity: This is referred to as one of the types of social influences that involves an individual's change in behavior and beliefs to fit in with a specific group.
Self-serving bias: It is referred to as a person's propensity to attribute any positive event or situation to his or her own character whereas negative event or situations towards external factors.
Obedience: This is referred to as a type of compliance along with the commands that are being provided by an authority figure.