Which of the following does not differentiate the gallbladder from the liver?

A) Microvilli are present on gallbladder epithelial cells
B) The gallbladder epithelium is folded
C) The muscularis mucosae of the gallbladder is thicker than that of the liver
D) There are no mucus-producing cells in the gallbladder
E) Water is reabsorbed from the bile in the gallbladder