Which of the Following Is a Disadvantage to E-Therapy

Which of the following is a disadvantage to e-therapy?

A) It is a way for individuals to get treatment if they are too shy or embarrassed to see someone in the traditional face-to-face context.
B) It generally costs less than traditional psychotherapy.
C) It has shown to be as effective for serious disorders as traditional psychotherapy.
D) It is helpful to those who may need therapy but have disabilities, which may make travelling quite difficult.