Why Do the Pharynx,esophagus,anus,and Vagina Have a Similar Epithelial Organization

Multiple Choice

Why do the pharynx,esophagus,anus,and vagina have a similar epithelial organization?

A) All these sites are avascular.
B) All these sites are well vascularized.
C) All these sites need large amounts of mucus production.
D) All these sites line hollow organs.
E) All these sites are subject to physical stresses and abrasion.