Correct option is A. Escherichia coli
The researchers isolated metabolic genes from
multiple species of bacteria and pieced them together
in Escherichia coli (E.coli) to create artificial biochemical pathways that convert free fatty acids to
hydrocarbons. One such pathway, named CEDDEC,
contained metabolic genes from the bioluminescent
bacterium Photorhabdus luminescens and the cyanobacterium Nostoc punctiforme. When grown
in broth containing various combinations of fatty
acids, or when modified to express additional
genes, the engineered E. coli produced molecules
that are structurally and chemically identical to 10
retail diesel fuel hydrocarbons commonly used in
temperate climates.