What is Scheuermann's disease?

I - Scheuermann's disease is a condition of hyperkyphosis that involves the bodies and discs of the vertebral column.
II - Scheuermann's disease is considered an osteochondrosis.
III - The prevalence of Scheuermann's disease is the same according to the definition used.
IV - The etiology of Scheuermann's disease has been established.
V - The most accurate theory about the etiology of Scheuermann's disease is the one that suggests a hereditary component.
a) Only I, II and IV are correct.
b) Only II, III and V are correct.
c) Only I, II and V are correct.
d) Only III, IV and V are correct.
e) All statements are correct.