<span>The answer is B. the assassination of Archduke Franz Ferdinand in Sarajevo
Powder keg in general term is a barrel of gunpowder but it is also used figuratively to refer to the way a small event sets off something much larger. Europe already had many small conflicts but in this event Archduke Franz Ferdinand was a heir to the austrian empire so as he was killed by Sarajevo who was Serbian Austria declared war on Serbia. Serbia was an ally of Russia.So Russia declared war on Austria-Hungary, then Triple Alliance and Triple Entente kicked in, bringing the entire continent to war.</span>
King George lll and Parliament believed they had the right to tax the American colonies. A lot of the colonists felt they shouldn’t pay these taxes because they were passed in England by Parliament, not by their own colonial governments that were right there. They protested the taxes saying that these taxes violated their rights as British citizens.
Bennelong was captured and imprisoned by Arthur Phillip's men.<span />
The Australian frontier wars<span> were a series of conflicts that were fought between </span>Indigenous Australians<span> and mainly </span>British settlers<span> that spanned a total of 146 years
I hope this helps you a lot (:</span>
