You need to configure a GRE tunnel on a IPSec router. When you are using the SDM to configurea GRE tunnel over IPsec， which two parameters are required when defining the tunnel interfaceinformation？（）

• A、The crypto ACL number
• B、The IPSEC mode （tunnel or transport）
• C、The GRE tunnel interface IP address
• D、The GRE tunnel source interface or IP address， and tunnel destination IP address
• E、The MTU size of the GRE tunnel interface