Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices the meaning in important ways or leave out essential information. A. The extinction of moa suggests the vulnerability of species to human-caused changes to the species' environment. B. Some species, such a moa, are vulnerable to changes in their environment. C. The environmental changes that moa experienced included modifications to plant and animal life and the introduction and elimination of certain animal species. D. The story of moa raises issues that are important for ecologists to consider.