Answer:
This study was an experiment. 
Explanation:
An experiment demonstrated to compare the behavior of the two groups, the one who watched the violent film and the the one who did not. the research was made to figure out the impact of violence in human development. 
 
        
             
        
        
        
Answer:
B.Add Demand 1 to right of Demand.
Explanation:
This is because we want to increase quantity while decreasing price, so we would want to add anouther demand line to the left of the origanal to make it so that we decrease price but increase quantity.
 
        
             
        
        
        
Answer:
Reducing trade barriers
Explanation:
<u>If governments choose protectionism, they harm citizens who could benefit from the products, services or jobs offered by foreign companies.</u>
If, for example, the “A” government sets <em>tariffs to protect the domestic market</em>, the “B” government <em>could respond with tariffs in retaliation</em>, which would result in both countries being harmed. So, the problem of trade warfare is still represented by a “Prisoner's Dilemma” game because it says that two people, in this case, two governments, can decide not to cooperate even if it goes against the interest of both.
On the other hand, <em>unrestricted free trade could go against governments that develop trade policies based on national economic well-being.</em>
The game's equilibrium solution would be for both countries to opt to reduce their trade barriers through negotiations.