In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.
cccbb _ aa _ cc _ bbbaa _ c
a _ cdaab _ cc _ daa _ bbb _ ccddd
_ bcc _ ac _ aabb _ ab _ cc
abca _ bcaab _ aa _ caa _ c
b _ ac _ cc _ cb _ ab _ ac
c _ ac _ aa _ aa _ bc _ bcc