Answer the following question: You are presented with the quiz "What compound or substance can frogs smell and taste?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "amphibians have sense organs to smell and taste chemicals" and "frogs are the most durable of the amphibians". So, what's the best answer to the question?

Options are:
I. herbicide.
II. hydrocarbons.
III. Chemicals.
IV. Acids.
V. acetic acid.
VI. an object.
VII. thirst.
VIII. Pesticides.
Answer:
III.