Why did American colonists become upset with English rule in the 1760s? A. King George III refused to appoint royal governors to the colonies. B. The New England colonies wanted to unite with Canada. C. Americans sympathized with France in the French and Indian War. D. Parliament passed new taxes on the colonies without granting them representation.



The answer is (D).
some addditional information from internet.
March 22, 1765 – The Parliament of Great Britain passes the Stamp Act, imposing the first direct tax levied from Great Britain on the thirteen American colonies. This is to help pay for British military operations in North America.