A treatment for bacterial infections from the early 20th century has made a comeback; the use of bacterial viruses to eliminate bacterial infections. Which explanation most accurately describes the mechanism of action behind this treatment?
1) The bacterial viruses directly kill the bacteria by disrupting their cell walls.
2) The bacterial viruses release toxins that kill the bacteria.
3) The bacterial viruses inject their genetic material into the bacteria, causing them to self-destruct.
4) The bacterial viruses stimulate the immune system to attack and eliminate the bacteria.