Which of the following is not correct about the stabilizing Forces?

• A. Protein structures from secondary to quaternary are maintained by noncovalent forces
• B. They include electrostatic interactions but not van der Waals forces, and hydrogen bonding
• C. Electrostatic interactions are a significant stabilizing force in a protein structure
• D. Electrostatic interactions occur when excess negative charges in one region are neutralized by positive charges in another region