Answer: This research study focused on the negative symptom called AFFECTIVE FLATTENING.
Explanation: AFFECTIVE FLATTENING is a Schizophrenia Symptom that is characterized by poor eye contract; reduced body language; relatively immobile and unresponsive facial expressions etc.
I believe The answer is A.a class system
Answer: D. An economic system characterized by voluntary allocation
Explanation: Socialism promotes or encourages the need for production, distribution and exchange to be run by community at large instead of only the government running the affairs of the community.
Socialism is a shared responsibility for the production and distribution of resouces between individuals in the community or a group. It is the economic and political theory that encourages individuals to do things collectively for the common goal of the society.