Which of the Following Would Be a Fact

Which of the following would be a fact?

A) Specific pathogens are directly responsible for specific diseases and conditions.
B) A fungal infection is solely responsible for the spread of white noses and associated higher mortality across bat populations and species.
C) Bats with white noses have been observed in the wild.
D) A fungal infection causes bats to wake up repeatedly during the winter and use up their fat reserves.