【单选题】

A、given street median is planted with trees. Of the 30 trees in the median, 3 are lindens, one-fifth are oaks, 12 are cedars, and the remainder are maples. What is the ratio of lindens to maples

A、1 to 10

B、1 to 4

C、1 to 3

D、1 to 2

E、3 to 1