A GRE tunnel is configured between a local and a remote site. Where should the service policy be applied to classify packets based on the pretunnel header? （）

• A、in global configuration mode， apply the service policy and use the qos pre-classify
• B、in global configuration mode， apply the service policy but do not use the qos pre-classify command
• C、apply the service policy on the physical interface but do not use the qos pre-classify
• D、apply the service policy on the tunnel interface but do not use the qos pre-classify command 
• E、apply the service policy on the tunnel interface and use the qos pre-classify command