Which of the following regarding the TTL of a BGP message is TRUE?

Which of the following regarding the TTL of a BGP message is TRUE?
A . TTL is a well-known mandatory BGP attribute.
B . The default TTL value of an eBGP message is 1, and 64 for an iBGP message.
C . The default TTL value of an iBGP message can be modified using the multihop command.
D . The default TTL value of an eBGP message can be modified using the "ttl-security" command.

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Answer: B