Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways for leave out essential information. A. The hundreds of different species of animals Forbes collected fell into eight distinct groups, each associated with a different depth zone. B. Forbes realized that depth zones, like elevation zones, contain hundreds of different species. C. By collecting hundreds of different animals on land and sea, Forbes discovered that there were eight elevation zones and eight depth zones. D. In addition to collecting different species of animals in eight ocean zones, Forbes collected different species of plants in eight mountain zones.