The Folding of a Protein into Its Native Shape Can

The folding of a protein into its native shape can best be described as:

A) a random event.
B) a random event catalyzed by ribosome proteins to maintain a low energy structure.
C) a series of controlled folds with a few random-shaped structures.
D) a series of repeatable random events where the lowest energy structure is maintained.
E) an event where the highest possible energy state is stabilized with discrete folding intermediates.