You Have Decided to Try Farming Fungi in a Terrarium

You have decided to try farming fungi in a terrarium.You buy an expensive starter kit but notice that after a few weeks of ample growth, the fungus is no longer doing well, yet is producing massive numbers of spores.Assuming that the moisture levels are appropriate, what is the most probable explanation?

A) The fungus has been infected with a virus.
B) The fungus has undergone sexual reproduction and is investing the majority of the energy it has harvested in the next generation.
C) The fungus is growing old and is accumulating too many lethal mutations.
D) The fungus is experiencing a dwindling food supply.
E) Antibiotics are being produced by some of the fungal hyphae and are affecting growth of hyphae that cannot tolerate these compounds.