Answer: B. sociocultural
Step-by-step explanation:
They are probably looking at factors in society and culture that can create a stimulus which has an affect on someone negatively .
I say this because they are looking at people from different countries, which may experience similar or different cultural and social issues .
They are looking at a country that is independent and how things can be different to a culture that is interdependent (that depend on each other ) in order to establish this one will be looking at different cultural influence and social influence .