Persons with Mutations in the FOXP2 Gene Suffer from a Severe

Persons with mutations in the FOXP2 gene suffer from a severe speech and language disorder.What is the nature of the disorder?

A) The lips are malformed.
B) People with the disorder are unable to perform the fine muscular movements of lips and tongue that are required for vocal communication.
C) People with the disorder have malformed vocal cords.
D) People with the disorder have a malformed tongue.
E) People with the disorder are deaf.