What Does Gastrin Do

What does gastrin do? 

A)  It stimulates the pancreas to secret bicarbonate-rich juices into the small intestine to maintain a slightly alkaline pH. 
B)  It stimulates stomach glands to release the components of hydrochloric acid to maintain an acidic pH. 
C)  It stimulates the gallbladder to secret bile into the duodenum to emulsify fats. 
D)  It stimulates the pancreas to secret enzyme-rich juices to digest fats and proteins. 
E)  It stimulates the pancreas to secret enzyme-rich juices to slow GI tract motility