单项选择题

A.1/5000~1/10000 1/2500~1/5000 1/1000
B.1/1000~1/25000 1/5000~1/10000 1/5000
C.1/10000~1/20000 1/5000~1/15000 1/3000
D.1/10000~1/15000 1/2500~1/50000 1/5000