Refer to the exhibit. 
A spoke site that is connected to Router-A cannot reach a spoke site that is connected to RouterB, but both spoke sites can reach the hub. What is the likely cause of this issue?
A.
There is a router doing PAT at site B.
B.
There is a router doing PAT at site A.
C.
NHRP is learning the IP address of the remote spoke site as a /32 address rather than a /24
address.
D.
There is a routing issue, as NHRP registration is working.