Dr. Chang is asked by Jiang's mother to explain why Jiang is easily distracted, impulsive, and socially anxious. Given that medical history reveals the diagnosis of ADHD in Jiang's father, Dr. Chang suggests Jiang may have a predisposition for the learning disorder. Dr. Chang's views reflect the __________ perspective of development.
a. Evolutionary
b. Behavioral
c. Cognitive
d. Humanistic