What are the radiographic alterations that allow a diagnosis of Scheuermann's disease?

I - One or more vertebral bodies in the shape of a wedge, of more than 5°.
II - An increase in thoracic kyphosis above 40°.
III - Irregularities in the vertebral platforms.
IV - Narrowing of the intervertebral spaces.
a) I and II are correct.
b) II, III, and IV are correct.
c) I, II, III, and IV are correct.