You are presented with the quiz "What is mutation essential for?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "mutations are essential for evolution to occur" and "evolution can be defined as continual progress". So, what's the best answer to the question?

Pick your answer from: I. rapid expansion II. sickness III. a continual progress IV. resistance V. growth VI. allow growth VII. Plant reproduction VIII. chromosomes
Answer:
III.