None of these it is the crowd most likely
The first alternative is correct (A).
The Second World War led Korea to be divided between two countries, North Korea, influenced by the USSR, and South Korea, with American influence. In 1950 the two sides entered a violent war that lasted 3 years and isolated any relationship between the two countries.
North Korea has become the most closed country in the world, with a communist economic model, where the population has no access to any kind of Western culture.
The country is dominated by a dictatorial clan, which is in the third generation, with Kin Jong-Un as the agent.
Court that try cases are called court of trial or trial court.
This is the place where a particular case is being discussed, investigate, prove and decide whether the court will give justice to what opponent.
The opponents also are given a chance to depend theirselves.
However, his psychology instructor explained to him that correlation does not mean causation. this means that exercising doesn't necessarily cause him to sleep longer. Other variables can be contributing to sleeping longer
(I read this)
It was to find clues I believe, he is a detective.