Which Is Not an Innate Protection of the Female Reproductive

Which is not an innate protection of the female reproductive tract?

A) Normal microbiome members generate products which prevent pathogen growth.
B) The vaginal lining contains ciliate cells which trap and expel bacteria from the tract.
C) The vaginal lining sheds its cells every few hours.
D) Lysozyme and antimicrobial peptides are present in vaginal secretions.
E) Mucous secretions trap microbes.