A successful authentication attempt by a RADIUS server does not supply a username to the JUNOS software. Which username is used by default？（）

A BGP router has the following configuration：  protocols{  bgp{  export[policy-1 policy-2 policy-3]；  }}  policy-options{  policy-statementpolicy-2 {  termget-statics{  fromprotocol static；  thenaccept；  }  termreject-all {  thenreject；  }  }  policy-statementpolicy-1 {  termget-aggregate {  fromprotocol aggregate；  thenaccept；  }  termreject-all {  thenreject；  }  }  policy-statementpolicy-3 {  termget-ospf {  fromprotocol ospf；  thenaccept；  }  termreject-all {  thenreject；  }  }  }   Which policy term is evaluated first when exporting routes？（）

A.get-ospf
B.reject-all
C.get-statics
D.get-aggregate

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Which action occurs when the BGP route 20.1.0.0 16 is evaluated by the policy expression？（） [editpolicy-options]  policy-statementreject_10 {  from{  route-filter20.1.0.0 16orlongerM  }  then{  communityadd 90-1；  accept  }}  policy-statementaccept_20 {  from{  route-filter20.1.0.0 16orlongerM  }  then{  communityadd 100-1；  reject；  }  }  community100-1 members 100：1；  community90-1 members 90：1  [editprotocols]  bgp{  groupebgp-group {  neighbor172.16.201.1 {  export（reject-10 && accept-20）；  }}}

A.The route is not announced.
B.The route is announced with 90：1 added.
C.The route is announced with 100：1 added.
D.The route is announced with communities 90：1 and 100：1 added.

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