mycelium, haustoria and exoenzymes?

Question

When a mycelium infiltrates an unexploited source of dead organic matter, what are most likely to appear within the food source soon thereafter?

1) exoenzymes
2) Haustoria

Answer 1

Exoenzymes = enzymes that are given off into the surroundings to digest organic matter.

NOT haustoria - these are parts of parasitic fungi and the question says "dead organic matter".