Which of the following is/are feasible within the context of phage research and phage therapy?

Question

I. A cocktail of phages personally tailored to an individual’s infection could be used to combat a specific type of antibiotic-resistant bacteria.
II. A protein molecule used by the phage to kill the host bacteria could be developed into a potential therapeutic agent.
III. Given the extraordinary number of viruses on the planet and the power of DNA sequencing technology, it is likely we might find new genes and thus new proteins that could help in the fight antibiotic-resistant pathogens.
IV. Clinical trials using greater numbers of human subjects will shed more light on the potential therapeutic benefits of phage therapy.