Autism is one of the neurological disorders that create confusion and parents are often unsure if their child is affected by such a developmental disability.

A. create confusion and parents are often unsure if their child is affected by such a developmental disability

B. create confusion and parents are often unsure whether their child is affected by such a developmental disability or not

C. creates confusion and parents are often unsure whether their child is affected by such a developmental disability

D. create confusion and parents are often unsure whether their child is affected by such a developmental disability

E. creates confusion and often parents are unsure whether their child is affected by a developmental disability of this sort

OA D

Source: Economist Gmat