_____ studies how much variation in personality can be attributed to genetic factors.

• A. Behavioral genetics
• B. Evolutionary psychology
• C. Humanism
• D. Psychoanalytic theory

Answer: (A)

Verified step by step guidance

1. Identify the key concept in the question, which is the study of how much variation in personality can be attributed to genetic factors.
2. Understand that this concept relates to the field of psychology that examines the influence of genetics on behavior and personality.
3. Review the provided options: Behavioral genetics, Evolutionary psychology, Humanism, and Psychoanalytic theory.
4. Recognize that 'Behavioral genetics' is the field specifically focused on understanding the role of genetic factors in behavior and personality differences.
5. Conclude that the correct answer is 'Behavioral genetics' as it directly addresses the study of genetic contributions to personality variation.