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.

labor leaders and organizations had the power to demand it.

explanation:

workers got a five-day workweek because the bcea protects and respect the rights of the employees. labor leaders and other groups demanded it.

- three-quarters or two-thirds..

- "the constitution provides that an amendment may be proposed either by the congress with a two-thirds majority vote in both the house of representatives and the senate or by a constitutional convention called for by two-thirds of the state legislatures."

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