The correct answer is
D) to discuss the withdrawal of the New England states from the Union
Step-by-step explanation:
On December 15, 1814, Federalist delegates gathered in Hartford, Connecticut, to discuss the impact of the War of 1812 on their home states' economies. The New England states did not support the war. They feared a land invasion and refused to place their militias under federal control. Therefore they wanted withdrawal from the union.