What Is the Function of Goblet Cells, Which Are Sometimes

What is the function of goblet cells, which are sometimes found interspersed throughout pseudostratified and simple columnar epithelium?

A) To produce new epithelial cells to replace worn out cells
B) To produce and secrete mucus
C) To provide oxygen to the nearby epithelial cells
D) To absorb nutrients for the epithelial cells
E) To engulf and destroy invading microorganisms