Refer to the exhibit.<br />  Which Virtual Router Redundancy Protocol （VRRP） statement is true about  the roles of the master virtual router and the backup virtual router？（）<br /> <img src="https://img.ppkao.com/2018-07/gelingxia/2018073015211171683.jpg" /><p> Refer to the exhibit.<br />  Which Virtual Router Redundancy Protocol （VRRP） statement is true about  the roles of the master virtual router and the backup virtual router？（）<br /> <img src="https://img.ppkao.com/2018-07/gelingxia/2018073015211171683.jpg" /></p>
A、A. Router A is the master virtual router， and Router B is the backup virtual router. When Router A fails， Router B will become the master virtual router. When Router A recovers， Router B will maintain the role of master virtual router.
B、B. Router B is the master virtual router， and Router A is the backup virtual router. When Router B fails， Router A will become the master virtual router. When Router B recovers， it will regain the master virtual router role.
C、C. Router A is the master virtual router， and Router B is the backup virtual router. When Router A fails， Router B will become the master virtual router. When Router A recovers， it will regain the master virtual router role.
D、D. Router B is the master virtual router， and Router A is the backup virtual router. When Router B fails， Router A will become the master virtual router. When Router B recovers， Router A will maintain the role of master virtual router.
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