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 or leave out essential information. A. When they are relatively young, hills and mountains successfully resist the destructive forces of nature. B. Although they seem permanent, hills and mountains exist for a relatively short period of geological time. C. Hills and mountains successfully resist the destructive forces of nature, but only for a short time. D. Hills and mountains resist the destructive forces of nature better than other types of landforms.