A Main Function of the Carbohydrates That Form the Glycocalyx

A main function of the carbohydrates that form the glycocalyx is to:

A) move large molecules in and out of the cell.
B) regulate water movement into the cell.
C) bind cell membranes to the cytoskeleton.
D) act as binding sites for signaling molecules.
E) maintain the proper fluidity of the plasma membrane.