哪一个配置可以预留1Mb的带宽？

【单选题】
A Protocols { mpls { label-switched-path LSP { to 10.0.0.1; bandwidth 1m; } interface all; } ospf { traffic-engineering; area 0.0.0.0 { interface all; } } } ldp { interface all; }}
B Protocols { rsvp { interface all; } mpls { label-switched-path LSP { to 10.0.0.1; bandwidth 1m; } interface all; } ospf { traffic-engineering; area 0.0.0.0 { interface all; } } }}
C Protocols { mpls { label-switched-path LSP { to 10.0.0.1; bandwidth 1m; } interface all; } ospf { area 0.0.0.0 { interface all; } } } ldp { interface all; }}
D Protocols { rsvp { interface all; } mpls { label-switched-path LSP { to 10.0.0.1; bandwidth 1m; } interface all; } ospf { area 0.0.0.0 { interface all; } } } ldp { interface all; }}

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