PLEASE HELP ME!

The table below shows the amounts of lime juice and sugar used in each container of limeade. The ratio of lime juice to sugar is 1:r, where r is the unit rate. Use the table to determine r. Lime Juice (cup) - 1/5,2,3 Sugar (cup) - 1,10,15

A) 1/5
B) 4
C) 2/3
D) 5