Is Child Psychotherapy Efficacious

Is child psychotherapy efficacious?

A) The results are unclear; the meta-analyses that have examined this have come to different conclusions.
B) Yes, but not as much as in adults; the meta-analyses that have examined this have shown reliably smaller effect sizes for children than adults.
C) Yes, with effect sizes comparable to effect sizes for adults; this indicates that efficacy is similar for children and adults.
D) Yes, but what we don't know is how well children without therapy would have fared; a controlled experiment still needs to be conducted.