Answer:
A is the only logical answer
In the 17th and 18th centuries, the use of silver Spanish dollars extended from the Spanish territories in the Americas westwards to Asia and eastwards to Europe, forming the first worldwide currency
The answer would be A. The Japanese were determined to fight to the end, even if defeat was inevitable. Japan ended up fighting till the end and ignored the warnings.
Many great European powers had been exploiting China's weak economic system to enforce their own trade regulations for years. The United States simply wanted to join the fray, so the Open Door notes were sent to the European powers basically stating, "Hey, you guys can't own all of China, make sure that all countries get to trade equally with them."
Just as a side note, the Open Door policy with China was extremely hypocritical for the United States, as the Monroe Doctrine of 1823 basically stated that none of the European powers could interfere with the Western Hemisphere... While no one was allowed to touch the Americas, the United States was apparently allowed to mess with the rest of the world.
