Final answer:
The U.S. was not justified in annexing Hawaii because it involved the overthrow of the Hawaiian queen, was driven by economic interests, and disregarded the will of the native Hawaiian people.
Step-by-step explanation:
The U.S. was not justified in annexing Hawaii for several reasons. First, the annexation came about through a process that involved the overthrow of the reigning Hawaiian queen, Liliuokalani, by American planters and the assistance of U.S. troops. This was seen as an illegal and unjust action by many. Second, the annexation was driven by economic interests, particularly the desire for control over Hawaii's lucrative sugar industry, rather than by any genuine need for strategic or military purposes. Lastly, the annexation disregarded the will of the native Hawaiian people, who had expressed strong opposition to becoming a part of the United States.