The correct answer is D. He thought the colonies should be taxed to pay for their defense.
Explanation:
George Grenville was the Prime Minister of Great Britain from 1763 to 1765 and an important politician in this country for most of his life. Additionally, George Grenville is known for creating the Stamp Act in 1765 that imposed taxes on the American colonies. This along with other similar acts were personally approved by Grenville who believed it was fair to tax colonies because Great Britain had provided defense to the colonies during the French and Indian War and therefore taxes were the way colonies paid for their defense. Therefore George Grenville "though the colonies should be taxed to pay for their defense".