What accurately describes an ICMP error message?

What accurately describes an ICMP error message?
A . ICMP error message will be generated for a datagram having a multicast address
B . ICMP error message will not be generated for a datagram having an address of 127.0.0.0
C . ICMP error message will be generated for a fragmented datagram that is not the first fragment
D . ICMP error message will be generated in response to a datagram carrying an ICMP error message

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Answer: B