Which Developmental Characteristic Should a Nurse Identify as Typical of a Client

Which developmental characteristic should a nurse identify as typical of a client diagnosed with severe mental retardation?

A) The client can perform some self-care activities independently.
B) The client has advanced speech development.
C) Other than possible coordination problems, the client's psychomotor skills are not affected.
D) The client communicates wants and needs by "acting out" behaviors.