which devices will appear in the output of a show cdp neighbors command issued from R2?

Refer to the exhibit.

If CDP is enabled on all devices and interfaces, which devices will appear in the output of a
show cdp neighbors command issued from R2?

A.
R2 and R3

B.
R1 and R3

C.
R3 and S2

D.
R1, S1, S2, and R3

E.
R1, S1, S2, R3, and S3

Explanation:
A Cisco device enabled with CDP sends out periodic interface updates to a multicast address in
order to make itself known to neighbors. Since it is a layer two protocol, these packets are not
routed. So the devices detected would be immediate connected neighbors.