Your answer, "E. All of the above," is correct. People can be classified in stable, systematic ways at different levels. The trait-dispositional level categorizes individuals based on their consistent patterns of behavior and personality traits. The Big-Five is a popular classification system that organizes personality traits into five broad dimensions: openness, conscientiousness, extraversion, agreeableness, and neuroticism. Additionally, projective tests can be used to assess and categorize individuals based on their responses to ambiguous stimuli, providing insights into their underlying thoughts, emotions, and personality traits. Therefore, all of these options -- A. the trait-dispositional level, B. projective tests, and C. the Big-Five -- can be used to classify people in stable, systematic ways.
