25. Which of the following, if true, would best support the author s statement that hot-spot activity may explain the mutability of continental plates?

　　Hot spots move more rapidly than the continental and oceanic plates.

　　Hot spots are reliable indicators of the age of continental plates.

　　Hot spots are regions of volcanic activity found only in the interiors of the continental plates.

　　The alignment of hot spots in the Pacific Ocean parallels the alignment of Pacific Ocean islands.

　　The coastlines of Africa and South America suggest that they may once have constituted a single continent that ruptured along a line of hot spots.

　　26. The author s argument that hot spots can be used to reconstruct the movement of continental plates is weakened by the fact that

　　hot spots are never found at the boundaries of plates

　　only extinct volcanoes remain after a plate moves over a hot spot

　　lava flow patterns for all hot spots have not been shown to be the same

　　the immobility or near immobility of hot spots has not been conclusively proven

　　the changing configurations of islands make pinpointing the locations of hot spots difficult

　　27. The author s style can best be described as

　　dramatic

　　archaic

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