Which of the Following Is the Conclusion of the Study

Multiple Choice

Which of the following is the conclusion of the study conducted by Costa and McCrae on approximately 1,000 college-educated men and women aged 20 to 96?

A) Considerable stability occurs in the five personality factors.
B) Extraversion is the most unstable personality factor.
C) While extraversion and openness remained stable, agreeableness and conscientiousness varied greatly.
D) The five personality factors were very unstable across different age groups.