In this scenario, which statement is correct?

You are currently using VLAN IDs 2 through 300 within your Layer 2 domain and you need to configure VSTP to prevent loops You must ensure that all VL ANs are loop free.

In this scenario, which statement is correct?
A . You must enable RSTP to account for all VLANs.
B . You must ensure that the VLANs are balanced between two different root bridges.
C . You must ensure that the bridge priority is set to the lowest value on all switches in the Layer 2 domain.
D . You must enable all VLANs, 2 through 300, under the VSTP configuration

Answer: D