The Key Factor in Determining Whether Being Born Deaf Will

The key factor in determining whether being born deaf will result in a delay in the acquisition of a theory of mind appears to be

A) how well parents are able to communicate with the child.
B) whether the deafness was the result of fetal alcohol syndrome or rubella.
C) the number of mirror neurons the child has in their cochlea.
D) the use of signing by parents (which almost always results in a delay) .