Answer:
Option D) Britainoccupied Detroit and controlled Lake Erie was true at the beginning of 1812. The War of 1812 had begun, and the British had established control of Detroit and much of the surrounding territory. The United States had not yet been able to mount a successful campaign in the region, and the British navy had a significant presence on Lake Erie. However, over the course of the war, the United States would make gains and eventually take control of the lake, leading to a turning point in the conflict.