The <u><em>correct answer</em></u> is <u><em>B. unarmed colonists</em></u>.
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The reason for this is because the Boston massacre was an event where A mob of colonials were rallying. One of the American colonists got into a brawl with a British soldier so he shot several <u>unarmed colonist</u>.
It couldn't have been other British soldiers because British soldiers didn't pointlessly shoot each other.
The event also didn't involve a conflict between the British and the colonial minutemen.
Also, revolutionary politicians wouldn't have been there because they usually laid back from conflict.
I think it’s the spinning wheel.
The correct answer is: Portugal.
The location of Portugal which was relevant to exploration is "on the coast of the Atlantic". This means that the Portuguese were very skilled at building ships and sailing, since they only bordered Spain and had to use ships to travel anywhere else.