You have defined VLANs and IP interfaces on an HP E5412 zl switch. Otherwise, the switch is at default
settings. What is the effect of the following command?
E5412(config)# spanning-tree

A.
MSTP is enabled globally. The switch will function as if RSTP were enabled until other MSTP parameters
are defined.

B.
MSTP is enabled globally. The switch will negotiate its role in the MST region with other switches.

C.
RSTP is enabled globally. To enable MSTP, you must specify the protocol for each VLAN that will be
included in the MST region.

D.
STP is enabled globally. A specific Spanning TreeProtocol must be enabled for each VLAN in the IST.