Final answer:
The lowest number of adult binge drinkers is found in the Midwest region of the United States, specifically in the Upper Midwest. The Northeast region also has a lower number of adult binge drinkers due to historical factors.
Step-by-step explanation:
The lowest number of adult binge drinkers is found in the Midwest region of the United States.
According to the information provided, researchers found that people in the Upper Midwest tend to be friendly and conventional, which may contribute to a lower prevalence of binge drinking.
In addition, it is worth noting that the temperance movement, which advocated for reduced alcohol consumption, gained significant support in the Northeast. This historical context may also explain why the Northeast region has a lower number of adult binge drinkers.