A
the other options either cause people to die (c) or offend people (b and d)
Vertabrate because slug doesn't have bones. it's a slug. fungus is nasty which cuts it out. Tulips are just flowers.
11460 years old is the answer.
The source of the infection most would be the first patient who contaminated the instrument used for endoscopic procedures since washing the instrument did not remove the bacteria so it does not come from the water, detergent or glutaraldehyde. Hope this helps. Have a nice day.