In Terms of Their Ability to Use Various Nitrogen Sources

Multiple Choice

In terms of their ability to use various nitrogen sources, which location would be least useful to fungi?

A) Ground where a dog just urinated (urine contains urea, ‎CH₄N₂O)
B) Well-aerated soil lacking organic matter
C) A dead animal carcass
D) A compost pile
E) A bathroom shower cleaned with household ammonia (NH₃)