After His Divorce, Brett Had Been Mildly Depressed and Decided

Multiple Choice

After his divorce, Brett had been mildly depressed and decided to attend a divorce recovery group meeting after talking to a friend who highly recommended group therapy. After attending one session, Brett says that he is feeling much better and that the group really helped him. One explanation for Brett's quick recovery could be his belief that going to the group could alleviate his depression. If this is the case, then Brett experienced a

A) therapy placebo effect.
B) spontaneous symptom remission.
C) therapy confirmation bias.
D) therapeutic alliance effect.