The parent reports the 13-month-old infant was using auditory expressive language. The vocalizations have been diminished over the last month and the child no longer says words. Select the best rationale for the infant's language behavior.
a) This behavior is common in children when autism is developing.
b) Biological factors such as otitis media could be causing hearing loss.
c) The environment has changed since the grandparents moved in with the family.
d) The parent has decreased the usual sensory stimulation for the child.
Answer: Biological factors such as otitis media could be causing hearing loss