Why did japan open its ports to european trade after centuries of isolationism?
a. a flood of foreigners entered the country, demanding more trade.
b. commodore matthew perry demanded that japan begin trading.
c. mt. fuji erupted and japan needed assistance.
d. a chinese invasion forced japan to end its isolationism.

B) Commodore Matthew Perry demanded that Japan begin trading.

Explanation:

It was not until the United States sent a war fleet to Japan under Commodore Mathew Perry that Japan was forced to open up its ports to foreign traders. Perry's four ships anchored in Tokyo Bay within sight of the Japanese capital.

The new steam ships, billowing with smoke, amazed the Japanese, who, because of their stern isolationism, had yet to have contact with Western industrialisation.

the answer is 250 percent.

so they can differentiate themselves from others as they saw themselves as the superior race. the star was basically a symbol that meant you are a less of a person than i am because of my race. the star was also degrading for those who had to wear it because they were aware of this and the nazis used the notion to make them feel less like a person.