Why not____to the south of China? I decide____to Hainan Island this summer.[ ]

A. going; to go    

B. go; going

C. go; to go    

D. to go; to go

根据《城镇燃气设计规范》，天然气储配站生产区应设置环形消防车道，消防车道宽度不应小于（）米；

A、3

B、3.5

C、4

D、4.5