Why does the author state that "it is difficult to understand how reduced predation would lead to sudden increases in Acanthaster numbers in several places at the same time in specific years?" A. To indicate the difficulty in proving that increases in Acanthaster numbers occur at the same time in different areas of the world. B. To identify a problem with a hypothesis that associates the increase in the population of Acanthaster with a removal of its predators. C. To argue against the hypothesis that human activities cause sudden population outbreaks of Acanthaster in different places at the same time. D. To argue against the view that the predators of Acanthaster decline because of pollution and harvesting by humans.