Eukaryal proteins undergo various chemical modifications after the translational process to ensure correct folding of the protein for optimal activity.Which of these are examples of such modifications?

A)hydrogen bond formation and disulfide bond formation
B)attachment of lipids and glucose molecules
C)acetylation and phosphorylation
D)hydrogen bond formation,disulfide bond formation,acetylation and phosphorylation are correct
E)all of these choices are correct