1. The answer is letter B.
Japan wanted that Joseon Dynasty(Korea) become his ally for they conquer Dinasty Ming(China), but they refused, Toyotomi Hideyoshi did not liked and sent his army to Korea, and so did Korea.
2. The answer is letter C.
The Dutch had permanent colonies, and became close with the people, they had another way to approach people. Concentrating in the commerce, while the Portuguese wanted only conquer territories.