Which command at the proper command prompt sets the STP mode to RSTP on the&#x007C… ?

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Your data center is expanding. You are configuring a new E5406 switch to provide &#x007C… data center. The new switch will integrate with your existing infrastructure of E5400&#x007C… as part of the STP topology in your data center.
Which command at the proper command prompt sets the STP mode to RSTP on the&#x007C… ?
A. Switch(config)# spanning-tree force-version rstp-operation
B. [Switch] stp mode rstp
C. Switch# rstp edged-port enable
D. Switch(config)# spanning-tree mode rstp-operation

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