Sophie Has Autism Spectrum Disorder and Is Not Responding to the Speech-Training

Sophie has autism spectrum disorder and is not responding to the speech-training technique known as "shaping and discrimination training." What other form of treatment might her therapist choose?

A) They can use children's music videos that have simple, repetitive lyrics.
B) They can use imitation techniques.
C) They can place the children in settings with other children with autism spectrum disorder without speech, so these children can develop their own methods of communication.
D) They can use devices with vocal output.