Why is it important to have an antibiotic resistance gene in the cloning plasmid? a. It makes the bacteria resistant to the antibiotic. b. It makes the bacteria produce more clones. c. It provides a way for sorting bacteria that have the gene of interest from the bacteria that just have an "empty" cloning plasmid. d. It provides a way for researchers to sort the bacteria that have the cloning plasmid from the bacteria that don't have the cloning plasmid. e. It aids scientists in developing new antibiotic treatments.