Which MST configuration statement is correct？  （）

• A、 MST configurations can be propagated to other switches using VTP.
• B、 After MST is configured on a Switch， PVST+ operations will also be enabled by default.
• C、 MST configurations must be manually configured on each switch within the MST region.
• D、 MST configurations only need to be manually configured on the Root Bridge.
• E、 MST configurations are entered using the VLAN Database mode on Cisco Catalyst switches.