A Psychologist Has a Theory That a Certain Mood Disorder

Multiple Choice

A psychologist has a theory that a certain mood disorder is largely due to a deficiency of the neurotransmitter ACS2. The psychologist believes that if the theory is correct then increasing the levels of ACS2 in people with that mood disorder will reduce their
Symptoms of the mood disorder. To test that hypothesis, the psychologist conducts a well-designed experiment. This example best represents:

A) deductive reasoning.
B) the confirmation bias.
C) propositional thought.
D) inductive reasoning.