Before the Diagnosis of Mental Retardation Can Be Made,which Factors

Before the diagnosis of mental retardation can be made,which factors must be present? (Select all that apply. )

A) IQ of 70 to 100
B) Inability to communicate effectively
C) Poor adaptation to social situations
D) IQ less than 70
E) Inability to care for self appropriate to age
F) Maladaptive coping skills