VFischeri Senses the Desity of V

V.fischeri senses the desity of V.fisheri cells in the environment by

A) secretion of a molecule that can then internalized and bound to a receptor in the cytoplasm.
B) cell surface receptors that interact with other cell surface receptors on other cells.
C) a cell surface receptor that binds to a molecule secreted by other cells present in the external environment.
D) a cytoplasmic receptor that binds to the lux C protein.