You insert a fragment of sheep DNA into a plasmid containing an AmpR gene.You transform bacteria with the recombinant plasmid,and plate the cells on growth media containing the antibiotic ampicillin.Each colony on the plate arose from _____ that ____ to ampicillin.
A)a single cell;is sensitive B)many bacteria;are resistant C)many bacteria;are sensitive D)a single cell;is resistant