Your Textbook States That "Research Comparing Individuals of Different Income

Your textbook states that "research comparing individuals of different income levels finds that men with high income levels have low rates of delinquency regardless of their testosterone,yet the rate of delinquency for low-income men varies with level of testosterone." This finding lends support to which of the following ideas?

A) level of testosterone is not related to aggressive tendencies.
B) level of testosterone accounts for increased aggression.
C) level of testosterone alone cannot account for increased aggression.
D) levels of testosterone is negatively related to aggression.