Which of the following shows a benefit of microorganism?

a. Mycobacterium tuberculosis can cause TB.

b. Algae is used as biofuels, fertilizer, and filters in wastewater treatment facilities.

c. Dinoflagellates can cause water discoloration.

d. Toadstool is not edible.

e. Amoeba can cause diarrhea and intestinal infection.