Which of the following pieces of evidence would best support the validity of the Big Five personality traits in describing human personality?
a) A study showing consistent correlations between self-reported personality traits and observer ratings over multiple cultures.
b) An analysis demonstrating that individuals' scores on Big Five traits remain stable over time.
c) Research indicating that people with high levels of neuroticism are more likely to experience anxiety and depression.
d) An experiment revealing significant differences in personality traits between identical twins raised apart.