Your Brother Has a Bacterial Infection

Your brother has a bacterial infection. He tells you he going to the gym where he plans to sit in the sauna for an hour. He thinks that this will cure his infection, because the heat in the sauna will denature the enzymes of the bacteria making him ill. You are a nursing student who is currently studying microbiology. You tell him that

A) his plan is sure to work because pathogens are mesophiles, so their enzymes will definitely become denatured and stop working.
B) his plan won't work; homeostasis will keep his body temperature constant even in the sauna, so the bacteria (and his normal microbiota and body cells)  will not be impacted.
C) his plan will work because his body temperature will likely rise to about 60ᵒC in the sauna, which is enough to denature the pathogen's enzymes.
D) his plan will work; the organism causing his illness will likely dehydrate and be killed in the sauna but he is probably going to contract a different pathogen in that environment.
E) his plan won't work; most pathogens are thermophiles so the temperature of the sauna will not affect the enzymes of the organism causing his illness.