Recommending That a Depressed Client Increase His or Her Activity

Recommending that a depressed client increase his or her activity level and get regular exercise is an example of

A) an improper use of therapeutic resources.
B) an evidence-based intervention that falls outside the traditionally defined roles of the psychotherapist.
C) an old-fashioned approach that is no longer considered valid.
D) an intervention that is based in folk-wisdom.