How do we know that intergenic exchange occurs in bacteriophages?

We can determine that intergenic occur because bacteriophages Undergo Intergenic Recombination. Bacteriophages can be bacterial viruses when it is infected a host bacterium by injecting their DNA. Bacteriophages, which can themselves undergo genetic recombination, can be involved in a mode of bacterial genetic recombination called transduction.

these are the choices

local priests

european monarchs

common people

bible translators

i think it's the cabinet