14. A patient is diagnosed with a bacterial infection and is prescribed penicillin. However, the bacteria are resistant to the antibiotic and continue to grow. Which structural feature most likely enables these bacteria to survive despite the presence of penicillin? (A) A Gram-negative cell wall with an outer membrane that protects a thin peptidoglycan layer. (B) A thick peptidoglycan layer in the bacterial cell wall. (C) High concentrations of lipopolysaccharides stored inside the cytoplasm. (D) A cell wall composed primarily of long polypeptides instead of peptidoglycan. (E) The absence of a plasma membrane, which prevents the drug from entering the cell.