Lenny, a 10-Year-Old Girl, Is Diagnosed with Childhood Depression

Lenny, a 10-year-old girl, is diagnosed with childhood depression. Her parents take her to a doctor who specializes in childhood depression and anxiety disorders. The doctor asks Lenny to write down her thoughts when she feels sad or tearful. Later, he asks Lenny to talk to herself in a positive way whenever she gets negative thoughts. Based on the given information, the treatment technique that is most likely used by the doctor is

A) psychoanalytic therapy.
B) drug therapy.
C) play therapy.
D) cognitive behavioral therapy.