Analize the following statements about epithelial tissues: I- The intercellular substance of epithelial tissues is abundant, which makes them resis...

Analize the following statements about epithelial tissues:
I- The intercellular substance of epithelial tissues is abundant, which makes them resistant to mechanical stress.
II- The main functions of epithelia are surface lining, protection, absorption of molecules, and secretion.
III- The shape of epithelial cells varies greatly, from tall columnar cells to flat, tile-like squamous cells, and also has intermediate forms between these two, such as cuboidal cells.
IV- Epithelial linings are rich in blood vessels, through which oxygen and nutrients reach their cells.

a) I and IV are correct.
b) II and III are correct.
c) II and IV are correct.
d) III and IV are correct.
e) I and II are correct.