GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 017IPS7G755_QNU5J

Which of the following statements about Arctic plants is supported by the passage? A. The decline in global temperature in the late Tertiary prevented many high-mountain plants from becoming established in the Arctic. B. There is not enough evidence to firmly establish the historical migration routes of present-day Arctic plants. C. Present-day Arctic plants are less likely to leave fossil remains than are plants outside the Arctic