The mental health nursing instructor is talking with the class about depression. what deficiency does the instructor explain will result in depression?

The correct answer is A: Norepinephrine, dopamine, and serotonin. Deficiency in these neurotransmitters is linked to depression. Norepinephrine and dopamine regulate mood and motivation, while serotonin affects mood regulation and emotional well-being. Low levels of these neurotransmitters can lead to symptoms of depression.

Choice B is incorrect because epinephrine is not typically associated with depression. Choice C is incorrect because gamma-aminobutyric acid is more related to anxiety disorders rather than depression. Choice D is incorrect because epinephrine is not typically linked to depression, and gamma-aminobutyric acid is more associated with anxiety.