Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
b _ e _ d k _ _ c e m _ k k b c _ m _ k k

A

c, k, k, b, d, e, d

B

c, m, k, b, d, e, d

C

c, k, m, b, d, e, d

D

c, m, k, b, c, c, d