The function of the goblet cells is to ________.
A. absorb nutrients from digested food and store them for future use
B. produce mucus that protects parts of the digestive organs from the effects of powerful enzymes needed for food digestion
C. secrete buffers in order to keep the pH of the digestive tract close to neutral
D. provide protection against invading bacteria and other disease-causing organisms that enter the digestive tract in food