Oscar is being treated for depression. His therapist, Annalise, encourages him to notice his unpleasant thoughts and feelings without trying to avoid them, but to recognize that they are spur of the moment ideas that Oscar does not really believe. She then encourages him to meditate daily to reduce and lower stress. This is likely an example of
a) Cognitive-behavioral therapy
b) Psychodynamic therapy
c) Gestalt therapy
d) Mindfulness-based cognitive therapy