A Medical Student Sees the Dentist Because of Sore Gums

A medical student sees the dentist because of sore gums.The dentist also notices small hemorrhagic spots under the student's skin.On questioning, the student says that he subsists mainly on the cookies and coffee that are sold at the campus bookstore.His problems are most likely related to:

A) Reduced synthesis of pre-procollagen chains.
B) Inability to hydroxylate prolyl residues in procollagen.
C) Inability to attach carbohydrate groups to procollagen.
D) Defective collagen crosslinking, resulting from impaired activity of lysyl hydroxylase.
E) Inability to convert pre-procollagen to procollagen.