Disulfide Bonds in a Protein Have Some Responsibility for Holding

Multiple Choice

Disulfide bonds in a protein have some responsibility for holding the protein molecule in its three-dimensional shape. Which statement is correct when considering disulfide bonds?

A) The disulfide bond is established by an oxidation reaction.
B) The disulfide bond can be broken by a reduction process.
C) Two thiol molecules combine to form a disulfide when treated with the oxidizing agent I₂.
D) All three statements are correct.