Calculate the seventh decile of the following data set.
23, 31, 26, 31 , 22, 63, 44, 78, 61 , 64, 35, 54, 57, 35, 73, 55, 50, 31 , 56, 32, 41 , 55, 29

A

58.5

B

55.8

C

52

D

60.4