Evaluate the role of the outer membrane in gram-negative bacteria's resistance to antibiotics.

• A. The outer membrane allows for increased permeability to antibiotics.
• B. The outer membrane acts as a barrier, preventing antibiotics from reaching the peptidoglycan layer.
• C. The outer membrane is irrelevant to antibiotic resistance.
• D. The outer membrane enhances the absorption of antibiotics.

Answer: (B)