Read this sentence from the passage. To some ecologists, this steep decline in biodiversity suggests that the Anthropocene epoch began in the 17th and 18th centuries, when the rate of extinction shot up dramatically. What does the author suggest about the rate of extinction with the phrase "steep decline"? A The idea of decline is geography related. B The acceleration of the extinction is rapid. C The idea of human role in the decline is debatable. D The effect of the decline on the humans is harmful.