Which of the following statements about the composition of bacterial capsules and slime layers is correct?

• A. Capsules are primarily made of lipopolysaccharides, while slime layers are composed of peptidoglycan
• B. Both capsules and slime layers are primarily composed of polysaccharides, but capsules may also include polypeptides
• C. Capsules consist exclusively of polypeptides, while slime layers are made of polysaccharides
• D. Slime layers are more likely to be composed of nucleic acids, whereas capsules contain glycoproteins