Which of the following bacterial structures primarily contributes to its ability to evade phagocytosis and is a key virulence factor for organisms like *Streptococcus pneumoniae* and *Neisseria meningitidis*?

✓ Correct Answer: Option C

Bacterial capsules are polysaccharide layers that surround the cell wall. They hide bacterial antigens, prevent phagocytosis by macrophages and neutrophils, and are a major virulence factor for many pathogenic bacteria.