Q: You are presented with the quiz "What kind of organism use cellulose for their cell walls?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "plants use cellulose for their cell walls" and "if the plant is green, it is a producer".   So, what's the best answer to the question?

Choices:
[a]. parasites;
[b]. animals;
[c]. Conifers;
[d]. fungus;
[e]. vegetation;
[f]. producers;
[g]. amoeba;
[h]. viruses;
The answer is:
[f].