Bile is secreted by 

• Bile or gall may be a dark green to yellowish brown fluid, produced by the liver of most vertebrates, that aids the digestion of lipids within the small intestine. 
• In humans, bile is produced continuously by the liver (liver bile) and stored and concentrated within the gallbladder. After eating, this stored bile is discharged into the duodenum. 
• Bile or gall acts to some extent, helps to emulsify the lipids in food. 

Hence, the correct answer is option C.