The correct answer is C. The psychologist was not qualified to give psychiatric advice.
Step-by-step explanation:
In general terms, health care professionals are limited to their field of expertise. This means, they should only advise patients, prescript medicine or perform medical procedures only if they are appropriately qualified; otherwise, they are acting unethically. For example, a nutritionist should not prescript medicine to treat chronic heart disease as it is a cardiologist the professional that is qualified for this.
In the case presented the psychologist shows an unethical behavior because he/she is giving psychiatric advice despite his/her focus is psychology and sleep behaviors rather than psychiatric medication. This might have negative effects on the patient because the psychologist might prescript inappropriate medication or provide inadequate advice.