Using the techniques employed by genetic engineering, a new species of

Using the techniques employed by genetic engineering, a new species of microorganism has been developed by laboratory scientists to aid in cleaning up oil spills by digesting the oil.

A. Using the techniques employed by genetic engineering, a new species of microorganism has been developed by laboratory scientists to
B. Using the techniques employed by genetic engineering, a new species of microorganism that was developed by laboratory scientists will
C. Using the techniques of genetic engineering laboratory scientists have developed a new species of microorganism to
D. Employing the techniques of genetic engineering there has been a development by laboratory scientists of a new species of microorganism that will
E. Employing the techniques of genetic engineering, a new species of microorganism that was developed by laboratory scientists will
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