Final answer:
The most accurate positive effect of the annexation of Hawaii was the improved economic opportunities for the people of Hawaii, particularly in the sugar industry due to the elimination of tariffs on Hawaiian sugar.
Step-by-step explanation:
When considering which statement was a positive effort of the annexation of Hawaii, it is clear that the annexation had considerable economic motives and consequences. Based on historical accounts, Option 3: Improved economic opportunities for the people of Hawaii is the most accurate positive effort of the annexation. After the annexation, the removal of tariffs on Hawaiian sugar offered an advantage to American planters and potentially improved economic opportunities within Hawaii's sugar industry, a key component of its economy at the time. To be noted, however, is that while some economic benefits did accrue from annexation, they were primarily enjoyed by American businessmen and landowners rather than the Native Hawaiian populace, whose political, social, and cultural autonomy was largely undermined.