When multiple AAA authentication methods are specified in a method list and all are working normally, how is the user authenticated?

When multiple AAA authentication methods are specified in a method list and all are working normally, how is the user authenticated?
A . The user is authenticated against all provided authentication sources and granted the least restricted set of access privileges
B . The user is authenticated against the first listed authentication source only
C . The user is authenticated against the provided authentication sources in order until a match is found
D . The user is authenticated against all provided authentication sources and granted the most restricted set of access privileges

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Answer: B