Answer:
The correct answer is c. Emergent norm.
Step-by-step explanation:
Emergent norm is a socio-psychological phenomenon in which a group of individuals adopts a new consensual behavior to adapt to a novel situation.
Basically, an emergent norm establishes what's the appropriate behavior in a situation that is ambiguous in nature.
Examples of situations where a norm can emerge:
The hostages of a robbery, the survivors of a plane crash creating communication cues, a group of people evacuating a fire-site that need and emergent norm to stay together while evacuating, etc.
In this particular case, an airplane has crashed on a deserted island off the coast of Fiji. The survivors are forced to learn new behaviors in order to adapt to the situation and each other. This is an example of the c. Emergent norm theory.