Select the combination of letters that when sequentially placed in the gaps of the given letter series will complete the series. a b c c _ _ _ a b _ _ _ d e _ _ c c d _ e a b _ _ _ d e

ddeccdabdccd ccdabdccddde ddeccdabddcc ddeccdabddcc

ddeccdabdccd

a b c c d d e / a b c c d d e / a b c c d d e / a b c c d d e d d e c c d a b d c c d