A Patient Tells a Nurse,"I've Been Having Excellent Results with Phototherapy,but

A patient tells a nurse,"I've been having excellent results with phototherapy,but as soon as I stop,my mood gets worse." The nurse responds:

A) "That is a strange reaction, but we know so little about light therapy that you may need to increase the dose."
B) "That is one of the drawbacks with light therapy; depression may come back rapidly once the therapy is stopped."
C) "I cannot account for your response to phototherapy. It is idiosyncratic, and you may need to take medication for your depression."
D) "I think your response to phototherapy is unusual, but your health care provider will be best able to advise you regarding what to do next."