The signal is most likely to be local signaling. The correct option is D.
What is local signaling?
Unlike hormones, some signaling molecules act directly to influence the conduct of neighboring cells.
A molecule released by one cell acts on neighboring target cells in paracrine signaling. The action of neurotransmitters in carrying signals between nerve cells at a synapse is one example.
Thus, the signal is most likely to be local signaling. The correct option is D.
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