Which of the Following Statements Accurately Describes the State of Empirical

Which of the following statements accurately describes the state of empirical research using solution-focused therapies?

A) Solution-focused therapies have a strong empirical base supporting both their efficacy and their brevity.
B) Solution-focused therapies show moderate efficacy for minor problems.
C) Solution-focused therapy may have a small, positive effect, but there is not a strong evidence base for it at this time.
D) Solution-focused therapies have not been empirically evaluated.
E) Solution-focused therapies are based on postmodern philosophy and therefore cannot be evaluated using a modernist research paradigm.