The right option is; B. Facultative halophiles
Facultative halophiles are the group of microorganisms that is most likely to spoil a freshwater trout preserved with salt because they can survive, grow and reproduce in extremely salty environments. Facultative halophiles can also survive and reproduce at not-high salt concentrations as they do not rely on high salt concentrations for growth. Examples of facultative halophiles are Staphylococcus aureus and Streptococcus spp.