Which of the Following Statements Are True of Portals of Entry

Which of the following statements are true of portals of entry and exit (Select all that apply) ?

A) The reproductive tract is the only portal of entry for the pathogens of sexually transmitted diseases.
B) Even a small break in the stratum corneum is a potential portal of entry for bacteria.
C) The HCl in gastric juice destroys many pathogens that enter with food and drink.
D) There is no direct portal of entry to the human nervous system.
E) The human large intestine is a portal of exit for water-borne diseases such as cholera.
F) The nose is a possible portal of entry,but not a portal of exit.