The response that best explains why the end of salutary neglect made the American colonies angry is:
The colonies had gotten used to being able to trade with whomever they wanted and paying lower taxes.
This reflects the reality that during the period of salutary neglect, the colonies enjoyed more autonomy and less direct control from Britain, allowing them to engage in trade freely and benefit from lower taxation. When Britain began enforcing stricter trade regulations and taxes, it disrupted the established practices and led to resentment among the colonists.