Sophia Has Been Diagnosed with Having Autism Spectrum Disorder

Sophia has been diagnosed with having autism spectrum disorder.Her parents note she has trouble coping when life is too unpredictable.She keeps all of her toys in a certain order on the shelf,and throws a tantrum if her mother moves any of them.Any small changes in her daily routine also cause her to become very upset,and she commonly throws tantrums when there are any variations to her schedule.This is an example of:

A) overstimulation.
B) stimulus over selectivity.
C) self-stimulatory behavior.
D) highly rigid and repetitive behavior.