Evaluate the impact of steric hindrance on the permissible regions of a Ramachandran plot.

• A. Steric hindrance only affects omega bond angles.
• B. Steric hindrance has no impact on the permissible regions.
• C. Steric hindrance limits the permissible regions by preventing certain bond angles.
• D. Steric hindrance expands the permissible regions by allowing more bond angles.

Answer: (C)