Which two options are two results of using the command spanning-tree vlan 50 root primary within a spanning-tree network under global configuration? (Choose two.)

Which two options are two results of using the command spanning-tree vlan 50 root primary within a spanning-tree network under global configuration? (Choose two.)
A . Spanning tree determines the priority of the current root for VLAN 50 and reduces the priority of the local switch to a lower value.
B . The priority value for VLAN 50 is set to 4094 on the root while the local switch priority is set to 32768.
C . The spanning-tree timers are reduced to improve the convergence time for VLAN 50.
D . All ports that are configured on the current switch with VLAN 50 transition to designated ports.
E . The switchport that is configured for VLAN 50 is the primary connection to the spanning-tree root switch.

Answer: AD