Final answer:
New York and New Jersey had the most colonists who remained loyal to Great Britain.
Step-by-step explanation:
The part of the country that had the most colonists who remained loyal to Great Britain was b) New York and New Jersey. These two colonies had a sizable number of loyalists due to factors such as their economic ties with Britain and the large population of Dutch and Anglican residents in the region.
Learn more about Loyalist colonists in the American Revolution