Iwill die tommarow if u dont (joking xd fr me out plz! which data set does this stem-and-leaf plot represent?

a { 39, 33, 15, 18, 18, 20, 3, 19, 41, 45, 18}
b {5, 5, 8, 8, 9, 0, 0, 3, 3, 9, 1, 5}
c {15, 19, 19, 20, 30, 33, 39, 41, 45}
d {30, 39, 33, 15, 15, 18, 20, 33, 19, 41, 45, 18}