Which of the Following Occurs When a Protein Is Denatured

Multiple Choice

Which of the following occurs when a protein is denatured? I.Covalent bonds are broken.
II) Hydrogen bonds are broken.
III) The protein loses its shape.
IV) The protein loses its biological activity.

A) All of these are correct statements.
B) All of these statements, except IV, are correct.
C) All of these statements, except I, are correct.
D) Only II and III are correct.
E) None of these statements is correct.