An 11-year-old is the tallest child in his sixth-grade class. He is thin, has a high arched palate, mild scoliosis, and joint hyperextensibility. He is an honor student, and enjoys basketball but must use prescription sports goggles so he can see the ball on the court. He is likely to have which of the following conditions?
a) Marfan syndrome
b) Down syndrome
c) Ehlers-Danlos syndrome
d) Turner syndrome