Which of These Statements Is True When Configuring MD5 Authentication

Multiple Choice

Which of these statements is true when configuring MD5 authentication between BGP peers?

A) All routers in the same AS must use the same MD5 password.
B) A pair of BGP peers must use the same MD5 password.
C) All BGP peers must use the same MD5 password.
D) Every BGP peer of a router must use a unique MD5 password.