MrsLittle Is Concerned About Derrick,a Student with Spina Bifida in Her

Mrs.Little is concerned about Derrick,a student with spina bifida in her fifth grade class.He wears a shunt to prevent hydrocephalus.He used to be friendly and outgoing,but lately he has been withdrawn and irritable.He also seems drowsy in class and has been complaining of headaches.Derrick's behaviors may indicate that

A) he needs to be repositioned more frequently
B) his spinal cord is becoming more damaged
C) he needs to spend more time exercising outdoors
D) his shunt may have become blocked or dislocated