Epithelial Tissues Have Polarity,with an Apical Side That Faces the Environment

Multiple Choice

Epithelial tissues have polarity,with an apical side that faces the environment and a basolateral side that faces the interior of the animal.Because of the harsh environmental exposure on the apical side,epithelial cells have a short life span of 2-6 days.Which of the following is the most likely reason that the tissue as a whole does not wear away,despite the short life spans of the cells?

A) The epithelial tissue is unusually thick.
B) The degraded tissue is recycled and restored to its original site.
C) The tissue has cells that actively undergo mitosis and cytokinesis to replace the lost cells.
D) New cells are transported in the blood to the site where old cells have worn away.