The answer is D (RICE WAS CULTIVATED IN THE SOUTH)
The differences were far greater. For starters, they had different beliefs, and not only religious beliefs but about life in general. They also used different weaponry and went through different types of training. Knights would also have land and control it while pledging allegiance to the King, while Samurai were not as powerful as nights were and were more just soldiers. They also came from different social backgrounds. If a knight's king would die they would just pledge their allegiance to the new king, while Samurai's lord's death would mean more or less the end of a samurai's job.
The missing answer to this question is Wealth.
The theory of mercantilism holds that a country’s economic power comes from a wealth. With this theory, a nation could increase its power and wealth in two significant ways. First, by obtaining as much as possible a silver and cold and second; it could establish a favorable balance of trade that can be sold more goods.
Japan, was the country that controlled Korea during WW2.