Answer:
A. Selective.
Step-by-step explanation:
This could be looked at in the sense of a little disorder from little Andrew, though the act is selective, it could also come up as mutuism. Some adults with selective mutism are fully capable of speech and understanding language but are physically unable to speak in certain situations, though speech is expected of them.
The behaviour may be perceived as shyness or rudeness by others. A child with selective mutism may be completely silent at school for years but speak quite freely or even excessively at home. There is a hierarchical variation among people with this disorder: some people participate fully in activities and appear social but do not speak, others will speak only to peers but not to adults, others will speak to adults when asked questions requiring short answers but never to peers, and still others speak to no one and participate in few, if any, activities presented to them.