How Was Ecoli Was Used to Aid in the Cloning of the of the Bioluminescent

How was E.coli was used to aid in the cloning of the bioluminescent genes from Vibrio fischeri?

A) Gene fragments from V.fischeri were transformed into E.coli and bioluminescent E coli were selected
B) Gene fragments from V.fischeri were cloned into plasmids transformed into E.coli and then reftransformed back into V.fischeri.
C) Gen fragments from E.coli were used to disrupt the bioluminescent genes of V.fischeri by homologous recombination
D) Transposons from E.coli were used to mutagenized the bioluminescent genes of V.fischeri.