Neuroscientists are the people who deal with the brain, behavior, and thinking. According to a neuroscientist, independence is the key to adulthood and a better nation. Thus, option B is correct.
Independence is the word that defines that the person is in not the control of others and not affiliated to follow the orders of others. When an individual is self-determined then they truly become adult.
When a person is interdependent and dependent on others then the working and the thinking ability decreases and the solitary life reduces the life expectancy rates.
Therefore, option B. independency makes adulthood.
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