Which of the description about IBGP neighbors and EBGP neighbors is wrong?

Which of the description about IBGP neighbors and EBGP neighbors is wrong?
A .  If two peers exchanging BGP packets belong to different autonomous systems, then these two peers are EBGP peers
B .  If two peers exchanging BGP packets belong to the same autonomous system, then these two peers are IBGP peers
C . IBGP peers must be directly connected physically
D .  Two routers running BGP must have IP connectivity to establish a TCP session

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Answer: C