All of the Following Processes Occur in Normal Cell Development

All of the following processes occur in normal cell development and metabolism.Which pair of processes is most important during development when cells are aggregating into tissues?

A) Carbohydrate signaling and cell movement
B) Diffusion and cell binding
C) Interaction of proteins and binding of lipids
D) Hydrophilic and hydrophobic movement of molecules
E) Cell recognition and cell adhesion