5 people died from the Boston Massacre.
Six were injured.
The correct answer is the declaration of independence.
It was mostly written by Jefferson and it pointed out to all the bad things the king has done against the colonies. These things were called grievances, and the grievances are the reason as to why they are breaking away from the empire in order to establish their own country.
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The Europeans found America and they all wanted to claim as much land as possible to extend their territories. This was also the start of the colonization era when many european powers rushed to make as many colonies in America as possible.
Salutary neglect was an undocumented British policy of avoiding strict enforcement of laws of Parliament, meant to keep the American colonies obedient to Great Britain.