A scientist cuts the gene that codes for insulin production from a strand of human DNA. He then inserts this gene into the plasmid of a bacterium, which causes the bacterium to produce insulin. The scientist harvests the insulin produced by the bacterium and packages it to be provided to diabetics. What type of biotechnology did the scientist in this scenario use to produce insulin? A. genetic engineering
В. DNA fingerprinting
C. reproductive cloning
D. selective breeding