Your Friend Has Contracted a Bacterial Infection

Your friend has contracted a bacterial infection.Which of the following hypothetical drugs would you suggest as the best way to prevent an antibiotic-resistant allele from arising and spreading throughout the bacterial population in her body?

A) a drug that prevents mutations but allows gene swapping
B) a drug that doesn't prevent mutations but does prevent gene swapping with individuals of its own species
C) a drug that doesn't prevent mutations but does prevent gene swapping with individuals of other species
D) a drug that doesn't prevent mutations but prevents gene swapping with any individual of any species
E) a drug that prevents both mutations and gene swapping