Which statement about&#819

Which statement about multicast VPN is true？（）

• AThe MDT group address should be the same for both address families in the same VRF
• BThe MDT group address should be the same for both address families in the different VRFs
• CConfiguration of the MDT source on a pre-VRF basis is supported only on IPv6
• DThe MDT group address should be different for both address families in the same VRF